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Williams Biology
Chapter 9 Study Guide
| Term | Definition |
|---|---|
| cell cycle | the life cycle of a cell from its beginning until it divides |
| mitosis | the process of dividing a cell's nucleus to make two identical nuclei |
| cancer | a condition in which a cell grows without control and divides too much |
| tumor | a ball of cells made from extra divisions of cancer cells |
| testosterone | male sex hormone |
| sperm | male sex cell |
| egg | female sex cell |
| gamete | human sex cell |
| estrogen | female sex hormone |
| zygote | a fertilized egg |
| fertilization | when the sperm meets the egg |
| ovary | organ that produces eggs |
| tetses | organ that produces sperm |
| human gestation period | 9 months |
| gestation time | period of development of a mammal from fertilization until birth |
| fetus | an embryo after eight weeks of development in the uterus |