PCAT Biology Reproduction
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PCAT Biology Reproduction
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25 Questions

1. Practiced by terrestrial vertebrates and provides a direct route for sperm to reach the egg cell -increased chance for fertilization success and females produce fewer eggs

2. Undergoes disjunction

3. Regrowth of a lost or injured body part

4. Mass of cells formed when the zygote divides

5. 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

6. Chromosomes condense - and the centriole pairs (in animals) separate and move towards the opposite poles of the cell. the spindle apparatus forms between them - and the nuclear membrane dissolves - allowing the spindle fibers to interact with the chr

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

8. Near the end of telophase - the cytoplasm divides into two daughter cells - each wit a complete nucleus and its own set of organelles -In animal cells - a cleavage furrow forms - and the cell membrane indents along the equator of the cell and finally

9. AKA lateral meristem -located between the xylem and phloem

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

11. Part of embryo that is the precursor of the upper stem and leaves

12. Menstrual flow

13. Inner layer of oocyte cell membrane

14. Two haploid cells yielded from meiotic division of primary spermatocytes

15. Produced in developing placenta if fertilization occurs - maintaining the corpus luteum and - thus - the supply of estrogen and progesterone that maintains the uterus - until the placenta takes over production of these hormones

16. Specialized cells with hard coverings that prevent loss of water

17. Bulbs - tubers - runners - rhizomes

18. The production of female gametes - occurs in the ovaries

19. 1) G1: Initiates interphase. is described as the active growth phase and can vary in length. the cell increases in size and synthesizes proteins. the length of the G1 phase determines the length of the entire cell cycle 2) S: the period of DNA synthe

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

21. Sporophyte generation is the dominant - familiar form

22. (In Anaphase I) homologous pairs separate and are pulled to opposite poles of the cell -accounts for a fundamental Mendelian Law -each chromosome of paternal origin separates (or disjoins) from its homologue of maternal origin - and either chromosome

23. Central region where - after replication - the chromosomes consist of two identical sister chromatids held together in interphase

24. Egg

25. Produces monoploid spores that develop into pollen grains