ch. 5 evolution of biodiversity abcd 100 200 300 400 500 100 200 300 400 500 100 200 300 400 500 100...
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Ch. 5 Evolution of Biodiversity
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What is a reasonable estimate for the number of species currently alive on the planet
Answer:10 million
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The physical expression of an organism’s genes is called its …
Answer:Phenotype
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Which measure of biodiversity takes into account the number of species present and the relative abundance of the species present?
Answer:Shannon-Weiner index
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Answer:1. True2. True3. False
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T or F genetic variation decreases in the following
1. Bottleneck effect2. Genetic drift3. Mutation
Answer:
1. Species richness and species evenness.
2. polyploidy
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1.What measurements are used to measure diversity within an ecosystem?
2.When does sympatric speciation occur?
An _______ is a trait that improves that individual’s fitness for an environment.
Answer:
Adaptation
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What occurs when a small group from a population colonizes a new area?
Answer:
Founder effect
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A flower with red petals produces purple petals, this is most likely the result of…
Answer:A genetic mutation
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Answer:Bottleneck effect
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When a population suddenly reduces in size either from habitat loss, natural disaster or other changes in the environment, its genetic variation is affected. This is known as…
Answer:1. False2. False3. True
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T or F is NOT an example of geographic isolation
1. Founder effect2. Allopatric speciation3. Sympatric speciation
Approximately what percentage of species that have lived on the planet is thought to be extinct?
Answer:99%
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In a small population, when genotypes are lost by chance it is called…
Answer:
Genetic Drift
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Give an example of artificial selection.
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Answer:
Dog breeding, horse breeding
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Answer:1. True2. True3. True
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T or F Evolution occurs in the following1. Natural selection2. Genetic drift3. Artificial selection
Answer:1. Phylogenetic tree
2. notochord500 pts
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1. this diagram is known as…
2. which structure is the most primitive?
A variety of genes within a species is called its …
Answer:
Genetic diversity
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What is most significant when determining the diversity of an ecosystem
Answer:
Number of species present
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Which two scientist are credited with developing the theory of evolution by natural selection?
Answer:
Darwin and Wallace
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A population of rabbits with typical variations of traits lives in a meadow with a depression running through the middle. Over time, the depression fills in with water and becomes a river, separating the one population into two. This is an example of….Answer:Allopatric speciation (geographic isolation)
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Answer:
1. False
2. True
3. True
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1. T or F All mutations are harmful.
2. T or F Phenotype can be affected by the environment
3. T or F Niche specialist are most vulnerable to environmental change
…
Answer:• …
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Answer:…
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Define limnetic, littoral, benthic and profundal zones.
Answers:
…
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