10.1 cell growth, division, and reproduction
DESCRIPTION
10.1 Cell Growth, Division, and Reproduction. 1. As a cell’s size increases, it amount of DNA stays the same. 2. T The amount of activity in a cell is related to its volume. 3. F The smaller the cell, the larger its ratio of surface area to volume. - PowerPoint PPT PresentationTRANSCRIPT
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10.1 Cell Growth, Division, and Reproduction
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1. As a cell’s size increases, it amount of DNA stays the same
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2. T The amount of activity in a cell is related to its volume.
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3. F The smaller the cell, the larger its ratio of surface area to volume.
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4. T The information crisis in a cell is solved by the replication of the DNA before cell division
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5. The library represents the cell’s DNA.
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6. Reproduction is the formation of new individuals.
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7. For single-celled organisms, cell division is a form of asexual reproduction
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8. Most multicellular organisms reproduce by sexual sexual reproduction.
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Asexual vs Sexual Reproduction
Similarities• Produce new
organisms• Transfer genetic
material to offspring
Differences• Asexual produces
genetic identical offspring
• Offspring from sexual reproduction get genetic information from both parents.
• Asexual cell separate in sexual cells join
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10. A cell cannot grow very large because if it did, it would be unable to transport needed materials into the cell and transport wastes out.
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How do cells grow and reproduce?
• The cell cycle:• In prokaryotes – asexual reproduction, called
binary fission – produces genetically identical cells (“clones”)
• In eukaryotes – cell cycle can be broken down into distinct stages
• Chromosomes – bundled DNA (look like an “x”)• Chromatin – DNA coiled with proteins (look like
ball of yarn)
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Cell Cycle1. Interphase – “normal” cells
– Divided into G1, S, and G2 phases
2. Mitosis – division of the nucleus– Divided into 4 phases (prophase,
metaphase, anaphase, telophase)
3. Cytokinesis – division of cytoplasm– In animals – cells pinch in two– In plants – cell cannot pinch due to
cell wall• Cell plate forms instead
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Describe and draw the phase for animal cells*Include labels: chromosome, chromatin, spindle fibers, centriole, chromatid, nuclear envelope
Interphase
Prophase
Cytokinesis Metaphase
Telophase Anaphase
DESCRIPTION: G1, S, G2(DRAWING)
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