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






2. 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






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






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






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






6. Undergoes disjunction






7. Nuclear division and followed by cell division






8. Cut piece of stem can develop new roots in water or moist gorund - which can be used to accelerate root formation -layering: stems of certain plants - will take root when bent to the gorund and covered with soil -stem of one plant (scion) can be atta






9. Mass of cells formed when the zygote divides






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






11. Part of embryo that grows and feeds the embryo






12. 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






13. (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






14. Produces monoploid spores that develop into pollen grains






15. 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






16. Division and distribution of the cell's DNA to its two daughter cells such that each cell receives a complete copy of the original genome






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






18. 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 -






19. Union of gametes






20. 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






21. 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






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






23. Result when a single zygote splits into two embryos






24. Four haploid cells produced from the second meiotic division after secondary spermatocytes






25. Common passageway for both the reproductive and exretory systems






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






27. Flowering plants consisting of a few cells that exist for a very short time






28. Triggered by acrosomal reaction causing calcium ions to be released into the cytoplasm






29. Centromeres split so that each chromatid has its own distinct centromere - thus allowing sister chromatids to separate. The sister chromatids are pulled toward the opposite poles of the cell by the shortening of the spindle fibers. Spindle fibers are






30. Eggs






31. AKA sperm production -occurs in the seminiferous tubules






32. 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






33. External pouch that maintains the testes' temperature at 2C-4C lower than body tmperature - a condition essential for sperm survival






34. Split to form several bulbs






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






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






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






38. Surrounded by two layers of cells






39. Specialized sex cells






40. Two haploid cells yielded from meiotic division of primary spermatocytes






41. Undifferentiated tissues in plants






42. 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






43. 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






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






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






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






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






48. Specialized organs where gametes are produced






49. 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






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