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PCAT Biology Reproduction

Subjects : pcat, biology
Instructions:
  • Answer 50 questions in 15 minutes.
  • If you are not ready to take this test, you can study here.
  • Match each statement with the correct term.
  • Don't refresh. All questions and answers are randomly picked and ordered every time you load a test.

This is a study tool. The 3 wrong answers for each question are randomly chosen from answers to other questions. So, you might find at times the answers obvious, but you will see it re-enforces your understanding as you take the test each time.
1. Occurs midway through the cycle -a mature ovarian follicle bursts and releases an ovum -caused by a surge in LH (Luteinizing Hormone) that is preceded - and in part caused - by a peak in estrogen levels






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






3. Produced when each meiotic division -rapidly degenerate






4. The process by which a cell doubles its organelles and cytoplasm - replicates its DNA - and then divides into two






5. Fibers of the spindle apparatus attach to each chromatid at the centromere to align the chromosomes at the center of the cell (equator)






6. Consists almost entirely of the nucleus - which contains the paternal genome






7. Releases spores form the undersides of its leaves that develop into small heart-shaped gametophytes






8. Method of growth - development - and replacement of worn-out cells






9. Haploid gametophyte gneration produces gametes by mitosis -gametophytes reproduce sexually - whereas the sporophyte gneration reproduces asexually






10. Occurs in vertebrates that reproduce in water (fish and amphibians) -female lays eggs in water and male deposits sperm in the vicinity -lack of direct passage of sperm from male to female reduces chances of fertilization considerably






11. Undifferentiated tissues in plants






12. 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






13. Part of embryo that grows and feeds the embryo






14. Menstrual flow






15. (In Prophase I) process where homologous chromosomes (chromosomes that code for the same traits - one inherited form each parent) come together and intertwine






16. Surrounded by two layers of cells






17. (In Prophase I) chromatids of homologous chromosomes break at corresponding points and exchange equivalent pieces of DNA -occurs between homologous chromosomes and not between sister chromatids of the same chromosomes (the latter are identical - so c






18. Located on scrotum -site for testosterone






19. Cut piece of stem can develop new roots in water or moist gorund - which can be used to accelerate root formation -layering: stems of certain plants - will take root when bent to the gorund and covered with soil -stem of one plant (scion) can be atta






20. Homologous pairs (tetrads) align at the equatorial plane - and each pair attaches to a separate spindle fiber by its kinetochore






21. Some species of plants have flowers that contain only stamens and other flowers that contain only pistils






22. The site of sperm deposition during intercourse and is also the passageway through which a baby is expelled during childbirth






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






24. Common passageway for both the reproductive and exretory systems






25. Reproductive structure of angiosperms






26. Underground stems with bubs - like the eyes of potatoes - that can develop into adult plants






27. Regrowth of a lost or injured body part






28. Result when two ova are released in one ovarian cycle and are fertilized by two different sperm






29. The production of female gametes -occurs in the ovarian follicles






30. If the ovum isn't fertilized - the corpus luteum atrophies - the resulting drop in progesterone and estrogen levels causes the endometrium (with its superficial blood vessels) to slough off - giving rise to menses






31. Part of embryo that develops into the lower and root






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






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






34. Replication of the nucleus followed by unequal cytokinesis -membrane pinches inward to forma new cell that is smaller in size but genetically identical to the parent cell






35. Diploid cells that undergo meiosis to produce four haploid sperm of equal size






36. Very similar to mitosis - except that meiosis II is not preceded by chromosomal replication -chromosomes align at the equator - separate and move to opposite poles - and are surrounded by a reformed nuclear membrane -new cells have the haploid number






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






38. The development of an unfertilized egg into an adult organism






39. Bulbs - tubers - runners - rhizomes






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






41. Thin and stalk like with a terminal sac called the anther






42. AKA sperm production -occurs in the seminiferous tubules






43. Muscular chamber which is the site of fetal development






44. 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






45. Result when a single zygote splits into two embryos






46. Secretes estrogen and progesterone






47. Have one cotyledon






48. Produces monoploid spores that develop into pollen grains






49. Outer layer of oocyte cell membrane






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