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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. Menstrual flow






2. Egg






3. Near the end of telophase - the cytoplasm divides into two daughter cells - each wit a complete nucleus and its own set of organelles -In animal cells - a cleavage furrow forms - and the cell membrane indents along the equator of the cell and finally






4. 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






5. Inner layer of oocyte cell membrane






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






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






8. Sporophyte generation is the dominant - familiar form






9. Produces two intermediate daughter cells with N chromosomes with sister chromatids






10. 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






11. Haploid gametophyte gneration produces gametes by mitosis -gametophytes reproduce sexually - whereas the sporophyte gneration reproduces asexually






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






13. Specialized cells with hard coverings that prevent loss of water






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






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






16. 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






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






18. 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






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






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






21. 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






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






23. As in mitosis - the parent cell's chromosomes are replicated in the 2N number of sister chromatids






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






25. Tail of sperm -propels the sperm - whereas mitochondria in the neck and body provide energy the locomotion






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






27. Mass of cells formed when the zygote divides






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






29. 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






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






31. Secretes estrogen and progesterone






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






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






34. Similar to mitosis in that a cell duplicates its chromosomes before undergoing the process -whereas mitosis preserves the diploid number of the cell - meiosis produces the haploid (1N) number - having the number of chromosomes






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






36. Specialized organs where gametes are produced






37. Split to form several bulbs






38. Result when a single zygote splits into two embryos






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






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






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






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






43. Muscular chamber which is the site of fetal development






44. 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






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






46. Have one cotyledon






47. (In Anaphase I) homologous pairs separate and are pulled to opposite poles of the cell -accounts for a fundamental Mendelian Law -each chromosome of paternal origin separates (or disjoins) from its homologue of maternal origin - and either chromosome






48. 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






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






50. Ex: estrogens and progesterone -synthesized by ovaries