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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. Located on scrotum -site for testosterone






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






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






4. (In Prophase I) chromatids of homologous chromosomes break at corresponding points and exchange equivalent pieces of DNA -occurs between homologous chromosomes and not between sister chromatids of the same chromosomes (the latter are identical - so c






5. Undergoes disjunction






6. 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






7. 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






8. Cell division that follows karyokinesis






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






10. Menstrual flow






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






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






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






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






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






16. 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 -






17. Diploid cells of spermatogonia






18. Inner layer of oocyte cell membrane






19. Part of embryo that grows and feeds the embryo






20. Specialized organs where gametes are produced






21. 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






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






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






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






25. AKA ovanan or fallopian tube -opens into the upper end of the uterus






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






27. 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






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






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






30. Sporophyte generation is the dominant - familiar form






31. 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






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






33. Nuclear division and followed by cell division






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






35. 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






36. A means of reproduction






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






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






39. 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






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






41. Regrowth of a lost or injured body part






42. Bulbs - tubers - runners - rhizomes






43. 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






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






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






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






47. 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






48. Can be fertilized during the 12-24hr after ovulation -occurs in the lateral - widest portion of the fallopian tube -sperm must travel through the vaginal canal - cervix - uterus - and into the fallopian tubes to reach the ovum






49. Female gonads that produce oocytes






50. Undifferentiated tissues in plants