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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. 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






2. Part of embry that are seed leaves






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






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






5. Have both functional male and female gonads






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






7. Located on scrotum -site for testosterone






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






9. 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 -






10. 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






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






12. Diploid cells of spermatogonia






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






14. Regrowth of a lost or injured body part






15. 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






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






17. 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






18. 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






19. AKA sperm production -occurs in the seminiferous tubules






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






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






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






23. Inner layer of oocyte cell membrane






24. Cell division that follows karyokinesis






25. AKA lateral meristem -located between the xylem and phloem






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






27. Outer layer of oocyte cell membrane






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






29. 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






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






31. Surrounded by two layers of cells






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






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






34. 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






35. 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






36. 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






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






38. Reproductive structure of angiosperms






39. 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






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






41. 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






42. Mass of cells formed when the zygote divides






43. Sporophyte generation is the dominant - familiar form






44. Undergoes disjunction






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






46. Central region where - after replication - the chromosomes consist of two identical sister chromatids held together in interphase






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






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






49. Nuclear division and followed by cell division






50. Uncoiled DNA