which one of the following was not a main idea that darwin advanced in his works? a) species change...

Which one of the following was not a main idea that Darwin advanced in his works?

A) species change over time B) living species have arisen from earlier life

forms C) modern species arose through a process

known as "descent with modification" D) new species can form by inheritance of

characteristics acquired during an individual’s life

E) new species arise by natural selection

Which one of the following was not a main idea that Darwin advanced in his works?

A) species change over time B) living species have arisen from earlier life

forms C) modern species arose through a process

known as "descent with modification" D) new species can form by inheritance of

characteristics acquired during an individual’s life

E) new species arise by natural selection

_____ and _____ generate variation, while ______ results in adaptation to the environment

A) genetic drift natural selectionmutation

B) mutation sexual reproduction natural selection

C) sexual reproduction natural selection mutationD) natural selection mutation sexual recombination

_____ and _____ generate variation, while ______ results in adaptation to the environment

A) genetic drift natural selectionmutation

B) mutation sexual reproduction natural selection

C) sexual reproduction natural selection mutationD) natural selection mutation sexual recombination

Which term describes structures similar in purpose but not inherited from a common ancestor?

a.homologousb.analogousc.vestigiald.embryonic

Which term describes structures similar in purpose but not inherited from a common ancestor?

a.homologousb.analogousc.vestigiald.embryonic

As a result of sexual reproduction, the rate of evolutionary change in the plant and animal kingdoms has been greatly speeded up because

A) characteristic change less frequent than in asexual reproduction

B) two parents have fewer offspring than one parent

C) the offspring show more diversity than in asexual reproduction

D) environmental changes never affect organisms produced by asexual reproduction

As a result of sexual reproduction, the rate of evolutionary change in the plant and animal kingdoms has been greatly speeded up because

A) characteristic change less frequent than in asexual reproduction

B) two parents have fewer offspring than one parent

C) the offspring show more diversity than in asexual reproduction

D) environmental changes never affect organisms produced by asexual reproduction

The hip bone of a python and the human tail bone are each examples of _____

a.Biogenesisb.Fossil recordc.Homologous structuresd.Vestigial Structures

The hip bone of a python and the human tail bone are each examples of _____

a.Biogenesisb.Fossil recordc.Homologous structuresd.Vestigial Structures

The human arm, the whale fin, and the bat wing are similar structures that result from evolution from a common ancestor. They are

a.divergent structuresb.vestigial structuresc.homologous structuresd.analogous structures

The human arm, the whale fin, and the bat wing are similar structures that result from evolution from a common ancestor. They are

a.divergent structuresb.vestigial structuresc.homologous structuresd.analogous structures

A similarity in DNA sequence between two species

a.does not indicate a relationshipb.is a genetic coincidencec.is impossibled.suggests a close relationship

A similarity in DNA sequence between two species

a.does not indicate a relationshipb.is a genetic coincidencec.is impossibled.suggests a close relationship

If a species lacks the variations needed to survive in a changing environment, it will most likely

a.acquire them through evolutionb.become extinctc.evolve into a lower formd.evolve into a higher form

If a species lacks the variations needed to survive in a changing environment, it will most likely

a.acquire them through evolutionb.become extinctc.evolve into a lower formd.evolve into a higher form

An inherited trait that increases chances of survival and reproduction is

a.a mutationb.not possible in naturec.a genotyped.an adaptation

An inherited trait that increases chances of survival and reproduction is

a.a mutationb.not possible in naturec.a genotyped.an adaptation

In the process of evolution, the effect of the environment is to

a.generate variation within the species b.prevent the occurrence of mutationsc.act as a selective pressure on variations

that exist within the speciesd.provide favorable conditions for the

survival of the species

In the process of evolution, the effect of the environment is to

a.generate variation within the species b.prevent the occurrence of mutationsc.act as a selective pressure on variations

that exist within the speciesd.provide favorable conditions for the

survival of the species

Which of the following provides evidence that vertebrates evolved from a common ancestor?

A) homologous structuresB) the presence of similar genesC) the presence of vestigial tail bones even

in vertebrate species that do not have a functional tail

D) All of the choices are correct

Which of the following provides evidence that vertebrates evolved from a common ancestor?

A) homologous structuresB) the presence of similar genesC) the presence of vestigial tail bones even

in vertebrate species that do not have a functional tail

D) All of the choices are correct

According to this evolutionary tree, which species is the common ancestor of lungfishes and amphibians?

a.Species 1b.Species 2c.Species 3d.Species 4e.Species 5f. Species 6

According to this evolutionary tree, which species is the common ancestor of lungfishes and amphibians?

According to this evolutionary tree, which species is the common ancestor of tetrapods and amniotes?

In England before 1850 (pre-Industrial Revolution), tree trunks were light-colored and peppered moths could be either light or dark colored.

After 1850, pollution was the immediate cause of

a.darker tree trunksb.darker mothsc.lighter tree trunksd.lighter moths

In England before 1850 (pre-Industrial Revolution), tree trunks were light-colored and peppered moths could be either light or dark colored.

After 1850, pollution was the immediate cause of

a.darker tree trunksb.darker mothsc.lighter tree trunksd.lighter moths

In England before 1850 (pre-Industrial Revolution), tree trunks were light-colored and peppered moths could be either light or dark colored. After 1850, pollution was the immediate cause of darker tree trunks.

The moth population became darker becausea. they were covered with sootb. birds were more likely to find and eat dark

mothsc. birds were more likely to find and eat light mothsd. the adults changed color to escape the birds

In England before 1850 (pre-Industrial Revolution), tree trunks were light-colored and peppered moths could be either light or dark colored. After 1850, pollution was the immediate cause of darker tree trunks.

The moth population became darker becausea. they were covered with sootb. birds were more likely to find and eat dark

mothsc. birds were more likely to find and eat light mothsd. the adults changed color to escape the birds

In England before 1850 (pre-Industrial Revolution), tree trunks were light-colored and peppered moths could be either light or dark colored. After 1850, pollution was the immediate cause of darker tree trunks. The moth population became darker because birds were more likely to find and eat light moths.

Birds in this case are examples ofa.an environmental pressureb.a variationc.an adaptationd.co-evolution

In England before 1850 (pre-Industrial Revolution), tree trunks were light-colored and peppered moths could be either light or dark colored. After 1850, pollution was the immediate cause of darker tree trunks. The moth population became darker because birds were more likely to find and eat light moths.

Birds in this case are examples ofa.an environmental pressureb.a variationc.an adaptationd.co-evolution

More than 1.5 million species of animals have been described, yet all of them have DNA that is made of the same building blocks. This is evidence that all animals have

a)a common ancestor. b)identical fossilsc)similar appearancesd)the exact same DNA sequences.

More than 1.5 million species of animals have been described, yet all of them have DNA that is made of the same building blocks. This is evidence that all animals have

a)a common ancestor. b)identical fossilsc)similar appearancesd)the exact same DNA sequences.

Use the following DNA sequences to answer the question below. Honey bee: G A T T C A G T C A Bumble bee: G A T T C A G T C GCarpenter bee: G T T T C A T T C A Leafcutter bee: C A T T G A C T C A Mason bee: C T A A G G C T A A Digger bee: G T T T G G C C A A

Which of the following is a valid conclusion based up on the data above?a) Honey bees are more closely related to bumble bees than they are to

leafcutter bees b) Mason bees are the honey bees closest "relatives"c) Carpenter bees are the bees least closely related to honey beesd) Mason bees are more closely related to honey bees than carpenter bees are

Use the following DNA sequences to answer the question below. Honey bee: G A T T C A G T C A Bumble bee: G A T T C A G T C GCarpenter bee: G T T T C A T T C A Leafcutter bee: C A T T G A C T C A Mason bee: C T A A G G C T A A Digger bee: G T T T G G C C A A

Which of the following is a valid conclusion based up on the data above?a) Honey bees are more closely related to bumble bees than they are to

leafcutter bees b) Mason bees are the honey bees closest "relatives"c) Carpenter bees are the bees least closely related to honey beesd) Mason bees are more closely related to honey bees than carpenter bees are

Refer to the diagram below. With one exception, all of these structures are homologous. Which of these structures represents an analogous structure?

Fertilized mosquito eggs can live in culture medium X. Culture medium Y is the same as X except DDT has been added to it. (DDT was an insecticide that is now banned) In culture medium Y, only a few eggs survive after 24 hours. (The black eggs are dead.) Culture medium Z is the same as culture medium Y, except no eggs have been added.

The few eggs surviving in culture medium Y probably

A) inherited an acquired characteristic.B) became resistant by the law of use.C) acquired a gene for resistance after DDT was added.D) had a variation for resistance to DDT.

The few eggs surviving in culture medium Y probably

A) inherited an acquired characteristic.B) became resistant by the law of use.C) acquired a gene for resistance after DDT was added.D) had a variation for resistance to DDT.

Addition of the DDT is a(n)

A) change in the environment

B) variation

C) stablilizing factor

D) acquired characteristic

Addition of the DDT is a(n)

A) change in the environment

B) variation

C) stablilizing factor

D) acquired characteristic

If eggs from the mosquitoes that developed from surviving culture Y were placed in culture Z,they would probablyA) dieB) survive and reproduceC)change formD) mutate

Your roommate was given an antibiotic for strep throat. After three days she is feeling fine and asks you if she should stop taking the antibiotic and save the pills for the next time she has a sore throat. Your best response would be:

A. Yes, quit taking them, because the role of antibiotics is to give the body's immune system enough time to fight off the infection, so she doesn't need the pills after she feels better.

B. No, she must finish her course of treatment because repeated exposure to antibiotics may result in drug resistant strains.

C. Yes, the antibiotics were very potent and able to kill off the infection more quickly than anticipated.

D. No, the infection is really not under control yet to the point that her immune system can finish fighting it off.

Your roommate was given an antibiotic for strep throat. After three days she is feeling fine and asks you if she should stop taking the antibiotic and save the pills for the next time she has a sore throat. Your best response would be:

A. Yes, quit taking them, because the role of antibiotics is to give the body's immune system enough time to fight off the infection, so she doesn't need the pills after she feels better.

B. No, she must finish her course of treatment because repeated exposure to antibiotics may result in drug resistant strains.

C. Yes, the antibiotics were very potent and able to kill off the infection more quickly than anticipated.

D. No, the infection is really not under control yet to the point that her immune system can finish fighting it off.

Which of the following statements is/are true of

BOTH bacteria and viruses?A.Can be killed with antibioticsB.Have a protein coatC.Contain DNAD.Single-celled organismsE.None of the above

Which of the following statements is/are true of

BOTH bacteria and viruses?A.Can be killed with antibioticsB.Have a protein coatC.Contain DNAD.Single-celled organismsE.None of the above

Which of the following statements is true of viruses but is NOT true of bacteria?

A.Has a cell wallB.Smallest in size C.Single-celled organisms D.Can be killed with antibioticsE.None of the above

Which of the following statements is true of viruses but is NOT true of bacteria?

A.Has a cell wallB.Smallest in size C.Single-celled organisms D.Can be killed with antibioticsE.None of the above

Tuberculosis is a _______ infection that is passed through ___________.A. viral, direct contactB. viral, animal bites C. bacterial, food D. bacterial, indirect contact

Eukaryotic cells differ from prokaryotic cells in that eukaryotic cells possess

A. Cell wallsB. CytoplasmC. A nucleusD. Ribosomes

Eukaryotic cells differ from prokaryotic cells in that eukaryotic cells possess

A. Cell wallsB. CytoplasmC. A nucleusD. Ribosomes

Plant cells differ from animal cells in that they possess

A. Cell wallsB. CytoplasmC. MitochondriaD. Ribosomes

Plant cells differ from animal cells in that they possess

A. Cell wallsB. CytoplasmC. MitochondriaD. Ribosomes

Most viruses are A. larger than bacteriaB. strands of nucleic acid (DNA or

RNA) enclosed within a protein coatC. treatable with antibioticsD. single-celled organisms

Most viruses are A. larger than bacteriaB. strands of nucleic acid (DNA or

RNA) enclosed within a protein coatC. treatable with antibioticsD. single-celled organisms

Penicillin is a common antibiotic used to treat infections. Which of the following statements is the most accurate prediction about this antibiotic?

A. It is as effective now as when it first came out. B. There are no microbes left that aren't

resistant to this antibiotic, given its widespread use.

C. In areas where this antibiotic is widely used, bacterial may become resistant to it.

D. None of the above

Penicillin is a common antibiotic used to treat infections. Which of the following statements is the most accurate prediction about this antibiotic?

A. It is as effective now as when it first came out. B. There are no microbes left that aren't

resistant to this antibiotic, given its widespread use.

C. In areas where this antibiotic is widely used, bacterial may become resistant to it.

D. None of the above

All cells possess all the following components EXCEPT

A. cytoplasm. B. ribosomes. C. a nucleus. D. plasma/cell membrane.

All cells possess all the following components EXCEPT

A. cytoplasm. B. ribosomes. C. a nucleus. D. plasma/cell membrane.

Animal cells possess all the following components EXCEPT

A. A nucleus and ribosomes. B. Chloroplasts and a large central vacouleB. Mitochondria and cytoplasm. D. Plasma/cell membrane and centrioles.

Animal cells possess all the following components EXCEPT

A. A nucleus and ribosomes. B. Chloroplasts and a large central vacouleB. Mitochondria and cytoplasm. D. Plasma/cell membrane and centrioles.

Which of the cell types below are prokaryotic cells

A.Plant cellsB.Animal cells. C.FungiD.Bacteria

Which of the cell types below are prokaryotic cells

A.Plant cellsB.Animal cells. C.FungiD.Bacteria

What is the correct relationship among DNA, genes and chromosomes? A)A gene contains many chromosomes which are composed of proteins B)A chromosome contains many genes which are composed of DNA C)A gene is composed of proteins which are found on the chromosomes D)A chromosome contains many genes which are composed of proteins

DNA and RNA are polymers of A. fatty acids B. nucleotidesC. monoglycerides

D. amino acids

DNA and RNA are polymers of A. fatty acids B. nucleotidesC. monoglycerides

D. amino acids

What are the parts of a nucleotide?

a. a phosphate, five-carbon sugar, and a nitrogen base b. a group of linked amino acidsc. one half of a DNA moleculed. a protein, a sugar, and a phosphatee. a phosphate, a six-carbon sugar, and a nitrogen base

What are the parts of a nucleotide?

a. a phosphate, five-carbon sugar, and a nitrogen base b. a group of linked amino acidsc. one half of a DNA moleculed. a protein, a sugar, and a phosphatee. a phosphate, a six-carbon sugar, and a nitrogen base

Which parts of a nucleotide make-up the backbone of a nucleic acid molecule?

A) phosphateB) sugarC) nitrogen base D) A and BE) B and C

Which parts of a nucleotide make-up the backbone of a nucleic acid molecule?

A) phosphateB) sugarC) nitrogen base D) A and BE) B and C

In double stranded DNA, the weak bonds between complementary nitrogen bases involve:

a. RNAb. DNAc. hydrogen bonds d. five-carbon sugarse. sulfur

In double stranded DNA, the weak bonds between complementary nitrogen bases involve:

a. RNAb. DNAc. hydrogen bonds d. five-carbon sugarse. sulfur

Which of the following is NOT one of the nitrogen bases in a DNA molecule?

a. adenineb. cytosinec. uracil d. thyminee. guanine

Which of the following is NOT one of the nitrogen bases in a DNA molecule?

a. adenineb. cytosinec. uracil d. thyminee. guanine

Cytosine will form a base pair only with:

a. cytosineb. adeninec. thymined. uracile. guanine

Cytosine will form a base pair only with:

a. cytosineb. adeninec. thymined. uracile. guanine

What is the base sequence of the DNA strand that would be complementary to the following single-stranded DNA molecule?

GGATCTGATCCAGTCA|||||||||||||||| _________________________________

What is the base sequence of the DNA strand that would be complementary to the following single-stranded DNA molecule?

GGATCTGATCCAGTCA

||||||||||||||||CCTAGACTAGGTCAGT

Identify components 1 and 2 of the DNAmolecule to the right.

Identify components 1 and 2 of the DNAmolecule to the right.1 = a phosphate2 = deoxyribose sugar

In this DNA, which of the following can 3 and 4 be?a)A and Gb)U and Ac)C and Cd)A and T

In this DNA, 3 and 4 are held Together bya)Barry Bondsb)Covalent Bondsc)Peptide bondsd)Hydrogen bonds

DNA replication A. occurs by the addition of nucleotides to the end of the DNA molecule. B. results in the formation of four new DNA strands. C. produces two brand new DNA strands that do not resemble the original strandD. uses each strand of a DNA molecule as a template for the creation of a new strand. E. begins when two DNA molecules join together to exchange segments.

Describe what is happening in eachstep of DNA replication(figure to right)

1: one parent double stranded DNA2: DNA unzips and unwinds3: Complementary nitrogen bases match up forming a new strand of DNA using an old strand as a template4: Two daughter double helices; each ½ old and ½ new

A double-stranded DNA is 21% cytosine. What is the percent of thymine in that DNA?

29 % thymine

A double-stranded DNA is 38% adenine.What is the percent of cytosine in that DNA?

12 % cytosine

The coded information in a DNA molecule determines the formation of

A. polysaccharidesB. polypeptidesC. monosaccharidesD. lipids

The coded information in a DNA molecule determines the formation of

A. polysaccharidesB. polypeptidesC. monosaccharidesD. lipids

Which one of the following sequences best describes the flow of information when a gene directs the synthesis of a cellular component? A.RNA → DNA → RNA → protein B.DNA → RNA → protein C.protein → RNA → DNAD.DNA → amino acid → RNA → protein

Two differences between DNA and RNA are that only the RNA contains a) ribose and uracil

b) deoxyribose and uracilc) deoxyribose and thymined) ribose and adeninee) ribose and thymine

Two differences between DNA and RNA are that only the RNA contains a) ribose and uracil

b) deoxyribose and uracilc) deoxyribose and thymined) ribose and adeninee) ribose and thymine

Which of the following correctly describes messenger RNA?

a. single strandedb. uracil replaces thyminec. many sugar to phosphate bonds are presentd. contains ribose sugare. all of the above

Which of the following correctly describes messenger RNA?

a. single strandedb. uracil replaces thyminec. many sugar to phosphate bonds are presentd. contains ribose sugare. all of the above

The process of making RNA from DNA is: a. transcription b. translation c. conjunctiond. peptide synthesise. this process cannot happen

Where is RNA synthesized in a cell?

a. nucleus b. mitochondriac. ribosomed. endoplasmic reticulume. golgi body

Where is RNA synthesized in a cell?

a. nucleus b. mitochondriac. ribosomed. endoplasmic reticulume. golgi body

What is the base sequence of the RNA strand that would be transcribed from the DNA sequence below?

GGATCTGATCCAGTCA|||||||||||||||| _________________________________

What is the base sequence of the RNA strand that would be transcribed from the DNA sequence below?

GGATCTGATCCAGTCA

||||||||||||||||CCUAGACUAGGUCAGU

The process of making proteins from RNA is:

a. transcription b. translation c. conjunctiond. peptide synthesise. this process cannot happen

The process of making proteins from RNA is:

a. transcription b. translation c. conjunctiond. peptide synthesise. this process cannot happen

The genetic code is redundant. This means A) One codon may code for several amino

acids B) The majority of organisms use the same

genetic code C) mRNA has sections of nucleotides that are

removed. D) Several different codons may code for the

same amino acid.

The genetic code is redundant. This means A) One codon may code for several amino

acids B) The majority of organisms use the same

genetic code C) mRNA has sections of nucleotides that are

removed. D) Several different codons may code for the

same amino acid.

Any change in the nucleotide sequence of DNA is called A)an advantageB) codon. C)a mutation. D)an anticodon

A physical or chemical agent that changes the nucleotide sequence of DNA is called

a) an anticodon b) a terminatorc) a transposon d) a mutagen.

A physical or chemical agent that changes the nucleotide sequence of DNA is called

a) an anticodon b) a terminatorc) a transposon d) a mutagen.

A frameshift mutation could result from A) a base insertion only B) a base deletion only C) a base substitution only D) deletion of three consecutive bases E) either an insertion or a deletion of a base

A point mutation could result from A) a base insertion only B) a base deletion only C) a base substitution only D) deletion of three consecutive bases E) either an insertion or a deletion of a base

Which mutation would be most likely to have a catastrophic effect on the functioning of a protein?

A) a base substitution near the start of the coding sequence but not in the start codon

B) a base deletion near the beginning of the coding sequence but not in the start codon

C) a base deletion near the end of the coding sequence, but not in the stop codon

D) deletion of three bases near the start of the coding sequence, but not in the start codon

Which mutation would be most likely to have a catastrophic effect on the functioning of a protein?

A) a base substitution near the start of the coding sequence but not in the start codon

B) a base deletion near the beginning of the coding sequence but not in the start codon

C) a base deletion near the end of the coding sequence, but not in the stop codon

D) deletion of three bases near the start of the coding sequence, but not in the start codon

Changing the codon AGC to AGA represents a ____ mutation.

A) Point B) Duplication C) Frameshift D) Deletion

Changing the codon AGC to AGA represents a ____ mutation.

A) Point B) Duplication C) Frameshift D) Deletion

A spontaneous mutation usually originates as an error in

A) DNA replication. B) DNA transcriptionC) translation. D) reverse transcription.

A spontaneous mutation usually originates as an error in

A) DNA replication. B) DNA transcriptionC) translation. D) reverse transcription.

True or False? A mutation always causes a mutant phenotype.

A) true B) false C) cannot be determined

True or False? A mutation always causes a mutant phenotype.

A) true B) false C) cannot be determined

During asexual reproduction, the genetic material of the parent is passed on to the offspring by

A) homologous pairing. B) mitosis and cytokinesis. C) meiosis and fertilization. D) meiosis and cytokinesis.

During asexual reproduction, the genetic material of the parent is passed on to the offspring by

A) homologous pairing. B) mitosis and cytokinesis. C) meiosis and fertilization. D) meiosis and cytokinesis.

Which of the following cells is haploid?a) egg cell b) lung cell c) sperm cell d) kidney celle) a and c

f) b and d

Which of the following cells is haploid?a) egg cell b) lung cell c) sperm cell d) kidney celle) a and c

f) b and d

Which of the following cells is diploid?a) egg cell b) lung cell c) sperm cell d) kidney celle) a and c

f) b and d

Which of the following cells is diploid?a) egg cell b) lung cell c) sperm cell d) kidney celle) a and c

f) b and d

Which of the following statements is false?

A) a typical body cell is called a somatic cellB) gametes are haploid cellsC) somatic cells are diploidD) somatic cells are made by meiosisE) a zygote is a fertilized egg

Which of the following statements is false?

A) a typical body cell is called a somatic cellB) gametes are haploid cellsC) somatic cells are diploidD) somatic cells are made by meiosisE) a zygote is a fertilized egg

An animal cell with 12 chromosomes undergoes normal meiosis. What is the total number of chromosomes in each of the resulting daughter cells?

a) 6 b) 8 c) 12 d) 24

An animal cell with 12 chromosomes undergoes normal meiosis. What is the total number of chromosomes in each of the resulting daughter cells?

a) 6 b) 8 c) 12 d) 24

Asexual reproduction of diploid organisms normally results in new organisms that contain cells withA) fewer chromosomes than are found in the cells of the parentB) the haploid number of chromosomesC) more chromosomes than are found in the cells of the parentD) the diploid number of chromosomes

How many total chromosomes are found in a normal gamete (sex cell) of a human?

a) 23 b) 32 c) 46 d) 64

How many total chromosomes are found in a normal gamete (sex cell) of a human?

a) 23 b) 32 c) 46 d) 64

Which of the following indicates the types of cells that are produced in humans by meiosis and mitosis?a) body cells (somatic cells ) are produced in both mitosis and meiosisb) body cells are produced in meiosis; gametes in mitosisc) gametes are produced in both meiosis and mitosisd) body cells are produced in mitosis; gametes in meiosis

As the result of normal meiosis, the daughter cells are

a) genetically identical to each other but not to the parent cell

b) genetically identical to the parent cell but not to each other

c) genetically identical to the parent cell and to each other

d) identical to neither the parent cell nor to each other

As the result of normal meiosis, the daughter cells are

Which of the following is haploid?A) zygoteB) embryoC) muscle cellD) gamete

Which process is represented in the diagram?

A) buddingB) mitosisC) fertilizationD) meiosis

Which process is represented in the diagram?

A) buddingB) mitosisC) fertilizationD) meiosis

As the result of normal mitosis, the daughter cells are

Diploid cells of the fruit fly Drosophila have 10 chromosomes. How many chromosomes does a Drosophila gamete have? A) one B) two C) five D) ten E) twenty

How many total chromosomes are found in a normal body cell (somatic cell) of a human?

a) 23 b) 32 c) 46 d) 64

How many total chromosomes are found in a normal body cell (somatic cell) of a human?

a) 23 b) 32 c) 46 d) 64

The abnormal zygote is most likely the result ofA) chromosome breakageB) gene linkageC) nondisjunctionD) polyploidy

The resulting abnormal zygote would be considered aA) monosomy B) trisomy

Chromosome number changes during meiosis because the process consists of

A) two cell divisions without any chromosome replication.

B) a single cell division without any chromosome replication.

C) two cell divisions in which half of the chromosomes are destroyed.

D) two cell divisions and only a single round of chromosome replication.

E) four cell divisions with no chromosome replication.

Chromosome number changes during meiosis because the process consists of

A) two cell divisions without any chromosome replication.

B) a single cell division without any chromosome replication.

C) two cell divisions in which half of the chromosomes are destroyed.

D) two cell divisions and only a single round of chromosome replication.

E) four cell divisions with no chromosome replication.

The diagram below shows a process that affects chromosomes during meiosis.

This process can be used to explain A) why some offspring are genetically

identical to their parentsB) the process of differentiation in offspringC) why some offspring physically resemble their parentsD) the origin of new combinations of traits in offspring

The diagram below shows a process that affects chromosomes during meiosis.

This process can be used to explain A) why some offspring are genetically

identical to their parentsB) the process of differentiation in offspringC) why some offspring physically resemble their parentsD) the origin of new combinations of traits in offspring

Sexual reproduction by necessity involves which two processes?A) meiosis and fertilizationB) mutation and translocationC) nondisjunction and differentiationD) mitosis and fertilization

Which diagram BEST represents the formation of a zygote that could develop into a normal human male?

Blight is a plant disease caused by a fungus that affects potato plants. Some wild breeds of potato have natural resistance to the fungus. These wild potatoes contain chemical compounds that cause them to taste bad. Scientists are trying to produce potato plants that are resistant to blight but still produce potatoes that taste good.

The development of a blight-resistant potato breed might be good for

the environment because the new potato breed will need _____________.

A. less waterB.less fertilizerC.less fungicideD.less field space

Blight is a plant disease caused by a fungus that affects potato plants. Some wild breeds of potato have natural resistance to the fungus. These wild potatoes contain chemical compounds that cause them to taste bad. Scientists are trying to produce potato plants that are resistant to blight but still produce potatoes that taste good.

The development of a blight-resistant potato breed might be good for

the environment because the new potato breed will need _____________.

A. less waterB.less fertilizerC.less fungicideD.less field space

Two farmers plant different varieties of corn on neighboring farms. Farmer A plants genetically modified corn. Farmer B plants a non-modified variety of corn. What would be farmer B’s primary concern if she plans to gather seed for next year’s crop?

A.loss of genetic variability in the non-modified variety B.that mutation rates will increase in the non-modified variety C.that insects will only pollinate the genetically modified corn D.unintended transfer of modified genes to her crop by cross-

pollination

Two farmers plant different varieties of corn on neighboring farms. Farmer A plants genetically modified corn. Farmer B plants a non-modified variety of corn. What would be farmer B’s primary concern if she plans to gather seed for next year’s crop?

A.loss of genetic variability in the non-modified variety B.that mutation rates will increase in the non-modified variety C.that insects will only pollinate the genetically modified corn D.unintended transfer of modified genes to her crop by

cross-pollination

which one of the following was not a main idea that darwin advanced in his works? a) species change...

Documents

modification d new species

individuals life e new

result of sexual reproduction

asexual reproductionb

structures similar

similar structures

common ancestor

asexual reproductionas