click on a lesson name to select. state standard 2e. compare the advantages of sexual reproduction...
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Click on a lesson name to select.
State Standard
2E. Compare the advantages of sexual reproduction and asexual reproduction in
different situations.
Cellular Growth (9.1)
9.1 Cellular Growth
Ratio of Surface Area to Volume
Chapter 9 Cellular Reproduction
Why Do Cells Need to Divide?
Cellular Reproduction
As the cell grows, its volume increases much more rapidly than the surface area.
The cell might have difficulty getting enough nutrients in and getting enough waste out.
The cell might have difficulty communicating instructions across long distances within a large cell.
Chapter 9
9.1 Cellular Growth
If a cell gets too large…
Why Do Cells Need to Divide? – Cont’d
The Cell Cycle
Cell division prevents the cell from becoming too large.
It also is the way the cell reproduces so that you grow, heal certain injuries, & replace worn out cells.
Cellular Reproduction
Cells reproduce by a cycle of growing and dividing called the cell cycle.
Chapter 9
9.1 Cellular Growth
Interphase is the stage during which the cell grows, carries out cellular functions, and replicates.
Mitosis is the stage of the cell cycle during which the cell’s nucleus and nuclear material divide.
Cellular ReproductionChapter 9
9.1 Cellular Growth
Cytokinesis is the method by which a cell’s cytoplasm divides, creating a new cell.
The Cell Cycle – Cont’d
Cellular Reproduction
Interphase – Stage G1
The first stage of interphase, G1
The cell is growing, carrying out normal cell functions, and preparing to replicate DNA.
Chapter 9
9.1 Cellular Growth
Cellular Reproduction
Interphase – Stage S
The cell copies its DNA in preparation for cell division.
Chapter 9
9.1 Cellular Growth
Cellular Reproduction
Interphase – Stage G2
The cell prepares for the division of its nucleus.
Chapter 9
9.1 Cellular Growth
9.1 Cellular Growth & Regulation
Cellular Reproduction
Normal Cell Cycle
Different proteins including cyclins time and control the life & activities of the cell.
The cell cycle has built-in checkpoints that monitor the cycle and can stop it if something goes wrong.
Chapter 9
Cellular Reproduction
Abnormal Cell Cycle: Cancer
Cancer is the uncontrolled growth and division of cells.
Cancer cells can kill an organism by crowding out normalcells, resulting in the loss of tissue function.
Chapter 9
9.1 Cellular Growth & Regulation
Cellular Reproduction
Causes of Cancer
The changes that occur in the regulation of cell growth and division of cancer cells are due to mutations.
Various environmental factors can affect the occurrence of cancer cells.
Chapter 9
9.1 Cellular Growth
1. A2. B3. C4. D
CDQ 3
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Cellular Reproduction
Chapter Diagnostic Questions
Chapter 9
A. cytokinesis
B. interphase
C. apoptosis
D. mitosis
Which is not a phase of the cell cycle?
1. A2. B3. C4. D
FQ 1
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Cellular ReproductionChapter 9
Which can more efficiently supply nutrients and expel waste products?
A. larger cells
B. smaller cells
C. cells with lower surface area to volume ratio
D. cells shaped like a cube
9.1 Formative Questions
1. A2. B3. C4. D
FQ 2
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Cellular ReproductionChapter 9
At what stage does a cell spend most of its life?
A. cytokinesis
B. interphase
C. mitosis
D. synthesis
9.1 Formative Questions
1. A2. B3. C4. D
FQ 3
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Cellular ReproductionChapter 9
What happens in the cell during cytokinesis?
A. The cell grows and carries
out normal functions.
B. The cell copies its DNA and forms chromosomes.
C. The cell’s nucleus and nuclear material divide.
D. The cell’s cytoplasm divides.
9.1 Formative Questions
1. A2. B3. C4. D
FQ 4
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Cellular ReproductionChapter 9
In what stage of the cell cycle does the cell’s replicated genetic material separate?
A. cytokinesis
B. interphase
C. mitosis
D. prophase
9.2 Formative Questions
1. A2. B3. C4. D
FQ 8
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Cellular ReproductionChapter 9
Which of these cancer-causing substances or agents is impossible to avoid completely?
A. chemicals such as asbestos
B. food and drinks that the FDA warns may contain carcinogens
C. tobacco and second-hand smoke
D. ultraviolet radiation from the Sun
9.3 Formative Questions
1. A2. B3. C4. D
CAQ 3
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Cellular ReproductionChapter 9
What is the role of cyclins in a cell?
A. to control the movement of microtubules
B. to signal for the cell to divide
C. to stimulate the breakdown of the nuclear membrane
D. to cause the nucleolus to disappear
Chapter Assessment Questions
1. A
2. B
3. C
STP 1
Cellular ReproductionChapter 9
Which cell has the lowest ratio of surface area to volume?
AB
C
Standardized Test Practice
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1. A2. B3. C4. D
STP 2
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Cellular ReproductionChapter 9
Standardized Test Practice
At what stage of interphase does the cell take inventory and make sure it is ready for the division of its nucleus?
A. G1
B. S
C. G2
D. M
1. A2. B3. C4. D
STP 3
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Cellular ReproductionChapter 9
Standardized Test Practice
Which occurs in plant cells but not animal cells during the cell cycle?
A. formation of a cell plate
B. formation of microtubules
C. formation of a cleavage furrow at the equator of the cell
D. movement of chromosomes to the poles of the cell
1. A
2. B
STP 4
Cellular ReproductionChapter 9
Standardized Test Practice
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Multiple changes in DNA are required to change an abnormal cell into a cancer cell.
A. true
B. false
1. A2. B3. C4. D
STP 5
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Cellular ReproductionChapter 9
Standardized Test Practice
Which is not a condition that can result in cancer?A. a failure in the control
mechanisms that regulate the cell cycle
B. a failure in the repair systems that fix changes or damage to DNA
C. a failure of the spindle fibers to move chromosomes
during mitosisD. mutations or changes in
segments of DNA that control protein production