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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. Undifferentiated tissues in plants






2. Regulates secondary male sex characteristics including facial and pubic hair and voice changes






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






4. Menstrual flow






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






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






7. The male organ of the flower and consists of a thin - stalk-like filament






8. 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






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






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






11. Located on scrotum -site for testosterone






12. (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






13. 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






14. Division and distribution of the cell's DNA to its two daughter cells such that each cell receives a complete copy of the original genome






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






16. Can be fertilized during the 12-24hr after ovulation -occurs in the lateral - widest portion of the fallopian tube -sperm must travel through the vaginal canal - cervix - uterus - and into the fallopian tubes to reach the ovum






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






18. Produced when each meiotic division -rapidly degenerate






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






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






21. Spore formation - vegetative propagation - and Artificial Vegetative Propagation






22. The spindle apparatus disappears. A nuclear membrane forms around each set of newly formed chromosomes. Thus - each nucleus contains the same number of chromosomes (the diploid number 2n) as the original or parent nucleus. The chromosomes uncoil - re






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. Triggered by acrosomal reaction causing calcium ions to be released into the cytoplasm






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






26. Outer layer of oocyte cell membrane






27. External pouch that maintains the testes' temperature at 2C-4C lower than body tmperature - a condition essential for sperm survival






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






29. Part of embryo that develops from the outer covering of the ovule






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






31. Found in the tips of roots and stems where growth in length occurs






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






33. Surrounded by two layers of cells






34. 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






35. Sporophyte generation is the dominant - familiar form






36. Hormonal secretions of the ovaries - the hypothalamus - and the anterior pituitary play important roles in the female reproductive cycle -divided into the follicular phase - ovulation - the luteal phase - and menstruation






37. Flowering plants consisting of a few cells that exist for a very short time






38. Found in the abdominal cavity - below the digestive system -consist of thousands of follicles






39. A means of reproduction






40. When a diploid sporophyte generation produces ahaploid (monoploid) spore by meiosis - spores divide by mitosis to produce the haploid - or gametophyte - generation






41. Similar to mitosis in that a cell duplicates its chromosomes before undergoing the process -whereas mitosis preserves the diploid number of the cell - meiosis produces the haploid (1N) number - having the number of chromosomes






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






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






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






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






46. 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






47. 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






48. Multilayered sac of cells that contains - nourishes - and protects an immature ovum -produce estrogen






49. Causes the glands of the endometrium to mature and produce secretions that prepare it for the implantation of an embryo -essential for the maintenance of the endometrium






50. Uncoiled DNA