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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. 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






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






3. Regrowth of a lost or injured body part






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






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






6. Reproductive structure of angiosperms






7. 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






8. 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






9. Split to form several bulbs






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






11. Menstrual flow






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






13. Undifferentiated tissues in plants






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






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






16. Nuclear division and followed by cell division






17. Union of gametes






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






19. Releases spores form the undersides of its leaves that develop into small heart-shaped gametophytes






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






21. Formed due to cortical reaction -hard layer that surrounds the ovum cell membrane and prevents multiple fertilizations -Followed by the fusion of sperm nucleus and form a diploid zygote






22. 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






23. Part of embry that are seed leaves






24. AKA stolon -woody - underground stems -can develop new upright stems






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






26. 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






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






28. Diploid cells of spermatogonia






29. 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






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






31. Uncoiled DNA






32. 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






33. 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






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






35. AKA sperm production -occurs in the seminiferous tubules






36. Result when a single zygote splits into two embryos






37. Undergoes disjunction






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






39. 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 -






40. Mass of cells formed when the zygote divides






41. 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






42. Sperm production -occurs in the seminiferous tubules






43. Have both functional male and female gonads






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






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






46. Large cell containing most of the cytoplasm - RNA - organelles - and nutrients needed by a developing embryo






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






48. The process by which gametes are produced -involves two divisions of primary sex cells resulting in four haploid cells called gametes






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






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