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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. Centriole pairs are now at opposite poles of the cell






2. Uncoiled DNA






3. Steroid hormones necessary for normal female maturation -stimulate the development of the female reproductive tract and contribute to the development of secondary sexual characteristics and sex drive -responsible for the thickening of the endometrium






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






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






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






7. 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






8. Split to form several bulbs






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






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






11. Part of embry that are seed leaves






12. 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






13. 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






14. 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






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






16. 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






17. Inner layer of oocyte cell membrane






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






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






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






21. Menstrual flow






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






23. Plants exhibit alternation of generation in which a diploid generation is succeeded by a haploid generation -diploid saprophyte generation produces haploid spores - which develop into the haploid saprophyte generation






24. (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






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






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






27. Diploid cells of spermatogonia






28. Sporophyte generation is the dominant - familiar form






29. Union of the egg and sperm nuclei to form a zygote with a diploid number of chromosomes






30. Differs from asexual reproduction in that there are two parents involved and the end result is a geneticaly unique offspring -fusion of two gametes






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






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






33. Have one cotyledon






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






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






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






37. Produced when each meiotic division -rapidly degenerate






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






39. Have two cotyledons that absorb the endosperm






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






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






42. Immature ova -all that a female will produce during her lifetime are already in her ovaries at birth






43. Specialized sex cells






44. Ex: estrogens and progesterone -synthesized by ovaries






45. Mass of cells formed when the zygote divides






46. Secretes estrogen and progesterone






47. 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






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






49. Passes through the penis and opens to the outside at its tip






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