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PCAT Biology Reproduction
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PCAT Biology Reproduction
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25 Questions

1. After ovulation - LH induces the ruptured follicle to develop into the corpus luteum

2. Centromeres split so that each chromatid has its own distinct centromere - thus allowing sister chromatids to separate. The sister chromatids are pulled toward the opposite poles of the cell by the shortening of the spindle fibers. Spindle fibers are

3. Reproductive structure of angiosperms

4. Egg

5. Lower - narrow end of the uterus -connects with the vaginal canal

6. Produced when one diploid primary female sex cell undergoes meiosis in the ovaries

7. Large cell containing most of the cytoplasm - RNA - organelles - and nutrients needed by a developing embryo

8. Gametophyte is the dominant generation -smaller - short lived organism that depends on the gametophyte for energy and nutrients - sporophytes grow on top of the gametophytes and produce spores that develop into gametophytes

9. AKA sperm production -occurs in the seminiferous tubules

10. Uncoiled DNA

11. Centriole pairs are now at opposite poles of the cell

12. Chromatin condenses into chromosomes - the spindle apparatus forms - and the nucleoli and nuclear membrane disappear

13. Produced when each meiotic division -rapidly degenerate

14. The embryonic undifferentiated cells that growth in higher plants are restricted to -undergo active cell reproduction

15. Comlex process involving the formation and fertilization of gametes and regulation of these processes by bot parents

16. (In Prophase I) each chromosome consists of two sister chromatids - each synaptic pair of homologous chromosomes containing four chromatids

17. Immature ova -all that a female will produce during her lifetime are already in her ovaries at birth

18. Formed due to cortical reaction -hard layer that surrounds the ovum cell membrane and prevents multiple fertilizations -Followed by the fusion of sperm nucleus and form a diploid zygote

19. Produces monoploid spores that develop into pollen grains

20. Daughter cells of unequal size produced from one primary oocyte per month completes meiosis I -expelled from the follicle during ovulation

21. Begins with the cessation of the menstrual flow from the previous cycle -FSH (Follicle Stimulating Hormone) from the anterior pituitary promotes the development of the follicle - which grows and begins secreting estrogen

22. Passes through the penis and opens to the outside at its tip

23. Meristems provide a source of cells that can develop into an adult plant -can occur naturally or through human intervention -advantagous because it introduces no genetic variation and is a rapid form of reproduction

24. Cell undergoes a period of growth and replication of genetic material before the initiation of mitosis -cell spends at least 90% of life in interphase -each chromosome is replicated so that during division - a complete copy of the genome can be distr

25. Undifferentiated tissues in plants

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