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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. AKA lateral meristem -located between the xylem and phloem






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






3. Specialized organs where gametes are produced






4. As in mitosis - the parent cell's chromosomes are replicated in the 2N number of sister chromatids






5. A means of reproduction






6. (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






7. 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






8. 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 -






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






10. Mass of cells formed when the zygote divides






11. 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






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






13. Secretes estrogen and progesterone






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






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






16. Undergoes disjunction






17. 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






18. Union of gametes






19. Produces monoploid spores that develop into pollen grains






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






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






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






23. 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






24. Contains elongated cell with head - tail - neck - and body






25. 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






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






27. Released from the ovary into the abdominal cavity and drawn into the nearby oviduct






28. (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






29. Have both functional male and female gonads






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






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






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






33. Bulbs - tubers - runners - rhizomes






34. Regrowth of a lost or injured body part






35. 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






36. Female gonads that produce oocytes






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






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






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






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






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






42. 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






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






44. Produces two intermediate daughter cells with N chromosomes with sister chromatids






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






46. 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






47. 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






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






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






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