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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. Mass of cells formed when the zygote divides






2. Part of embry that are seed leaves






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






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






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






6. Ex: estrogens and progesterone -synthesized by ovaries






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






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






9. 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






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






11. Have one cotyledon






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






13. Muscular chamber which is the site of fetal development






14. 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






15. Undifferentiated tissues in plants






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






17. Diploid cells of spermatogonia






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






19. 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






20. Nuclear division and followed by cell division






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






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






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






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






25. Outer layer of oocyte cell membrane






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






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






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






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






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






31. Located on scrotum -site for testosterone






32. 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






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






34. 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






35. 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






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






37. Eggs






38. Have two cotyledons that absorb the endosperm






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






40. 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






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






42. Inner layer of oocyte cell membrane






43. AKA sperm production -occurs in the seminiferous tubules






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






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






46. Regrowth of a lost or injured body part






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






48. Produced after meioisis from spermatids that undergo a series of changes -AKA mature sperm -specialized for transporting the sperm nucleus to the ovum -elongated cell with a head - neck - body - and tail






49. 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 -






50. 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