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






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






3. 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






4. 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






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






6. Regulates secondary male sex characteristics including facial and pubic hair and voice changes






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






8. 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






9. 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






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






11. Undergoes disjunction






12. Replication of the nucleus followed by unequal cytokinesis -membrane pinches inward to forma new cell that is smaller in size but genetically identical to the parent cell






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






14. Specialized organs where gametes are produced






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






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






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






18. Located on scrotum -site for testosterone






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






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






21. Have both functional male and female gonads






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






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






24. Nuclear division and followed by cell division






25. Inner layer of oocyte cell membrane






26. 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






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






28. Have one cotyledon






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






30. Diploid cells of spermatogonia






31. Female gonads that produce oocytes






32. AKA sperm production -occurs in the seminiferous tubules






33. Part of embryo that grows and feeds the embryo






34. Common passageway for both the reproductive and exretory systems






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






36. Outer layer of oocyte cell membrane






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






38. Cell division that follows karyokinesis






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






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






41. Uncoiled DNA






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






43. 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 -






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






45. 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






46. 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 -






47. Produced when each meiotic division -rapidly degenerate






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






49. Eggs






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