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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. 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






2. Specialized organs where gametes are produced






3. 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






4. Multilayered sac of cells that contains - nourishes - and protects an immature ovum -produce estrogen






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






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






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






8. 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






9. Secretes estrogen and progesterone






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






11. Part of embry that are seed leaves






12. Inner layer of oocyte cell membrane






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






14. Mass of cells formed when the zygote divides






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






16. Specialized sex cells






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






18. Cell undergoes a period of growth and replication of genetic material before the initiation of mitosis -cell spends at least 90% of life in interphase -each chromosome is replicated so that during division - a complete copy of the genome can be distr






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






20. Part of embryo that grows and feeds the embryo






21. Split to form several bulbs






22. Undergoes disjunction






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






24. 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






25. Regrowth of a lost or injured body part






26. Have both functional male and female gonads






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






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






29. 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






30. Union of gametes






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






32. Found in the abdominal cavity - below the digestive system -consist of thousands of follicles






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






34. Ex: estrogens and progesterone -synthesized by ovaries






35. Reproductive structure of angiosperms






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






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






38. Outer layer of oocyte cell membrane






39. Some species of plants have flowers that contain only stamens and other flowers that contain only pistils






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






41. Cell division that follows karyokinesis






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






43. 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






44. (In Prophase I) process where homologous chromosomes (chromosomes that code for the same traits - one inherited form each parent) come together and intertwine






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






46. 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






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






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






49. Sperm production -occurs in the seminiferous tubules






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