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8 Cards in this Set
- Front
- Back
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Describe the surface area-to-volume ratio as it relates to cell growth. |
As the dimensions double, surface area increases by 4x and volume by 8x. The larger a cell becomes, the more demands the cell places on its DNA. It also becomes less efficient in moving nutrients and waste materials across the cell membrane. |
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What is sexual and asexual production? |
Asexual production produces genetically identical offspring from a single parent, while in sexual production the offspring inherit their genetic information from two parents. |
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What are the advantages and disadvantages of sexual and asexual production? |
Asexual: lack of genetic diversity (+-), more efficient (+) Sexual: requires more time (+-), genetic diversity (+) |
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What occurs during each stage of the cell cycle? |
Interphase: rapid growth, DNA synthesis & replication, centrioles replicate Mitosis: nucleus divides during prophase, metaphase, anaphase, and telophase. Cytokinesis: cytoplasm divides. |
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Where does mitosis occur and what is its purpose? |
Mitosis occurs in body cells and allows allows for growth and repair of tissues. |
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What are the possible causes of cancer? |
Possible causes of cancer are radiation, certain chemicals, some hormones, genes, etc. |
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Explain how embryonic cells differentiate into many cell types. |
The fertilized egg and cells from the first few divisions of embryonic development are totipotent. After 4 days, it becomes a blastocyst and is pluripotent, allowing them to develop into many types of cells. |
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What are the benefits and issues with stem cell research? |
Stem cells can be used to repair damaged tissue, but some people have ethical issues because harvesting stem cells involves destroying the embryo. |
