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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. 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






2. Located on scrotum -site for testosterone






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






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






5. Part of embry that are seed leaves






6. Menstrual flow






7. Expanding partition that grows outward from the interior of the cell until it reaches the cell membrane






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






9. A tubelike structure formed by the sperm once in contact with the membrane -extends to the cell membrane and penetrates it - fusing the sperm cell membrane with that of the ovum -Sperm nucleus now enters the ovum's cytoplasm to complete Meiosis II






10. 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






11. 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






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






13. Male gonads - produce sperm in the tightly coiled seminiferous tubules






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






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






16. Simple form of asexual reproduction seen in prokaryotic organisms -DNA replicates and a new plasma membrane and cell wall grow inward along the midline of the cell - dividing it into two equally size cells with equal maounts of cytoplasm - each conta






17. A means of reproduction






18. Four haploid cells produced from the second meiotic division after secondary spermatocytes






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






20. Production of functional sex cells by adult organisms -fertilization forms a zygote -development of the zygote into another adult - completing the cycle






21. 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






22. Produced when each meiotic division -rapidly degenerate






23. Tail of sperm -propels the sperm - whereas mitochondria in the neck and body provide energy the locomotion






24. Stems running above and along the gorund - extending form the main stem -can produce new roots and upright stems






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






26. Cell division that follows karyokinesis






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






28. 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






29. Outer layer of oocyte cell membrane






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






31. Regrowth of a lost or injured body part






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






33. 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






34. 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






35. Production of offspring without fertilization -form new organisms by a single parent cell -offspring are genetic carbon copies of their parent cells -genetically identical to the parent cells (except mutations) -ex: fission - budding - regeneration -






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






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






38. Have one cotyledon






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






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






41. Diploid cells of spermatogonia






42. Uncoiled DNA






43. Egg






44. Pass from the testes through the vas deferens to the ejaculatory duct and then to the urethra






45. 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






46. Common passageway for both the reproductive and exretory systems






47. Nuclear membrane forms around each new nucleus -at this point - each chromosome still consists of sister chromatids joined at the centromere






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






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






50. Plant cells lack centrioles -spindle apparatus is synthesized by mcrotubule organizing centers that are not visible -cytokinesis in animal cells proceeds through production of a cleavage furrow -Plant cells are rigid and can't form cleavage furrows -