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






2. 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






3. Nuclear division and followed by cell division






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






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






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






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






8. After ovulation - LH induces the ruptured follicle to develop into the corpus luteum






9. Part of embry that are seed leaves






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






11. Muscular chamber which is the site of fetal development






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






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






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






15. Egg






16. Female gonads that produce oocytes






17. Located on scrotum -site for testosterone






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






19. Cell division that follows karyokinesis






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. Have two cotyledons that absorb the endosperm






22. Reproductive structure of angiosperms






23. Simple form of asexual reproduction seen in prokaryotic organisms -DNA replicates and a new plasma membrane and cell wall grow inward along the midline of the cell - dividing it into two equally size cells with equal maounts of cytoplasm - each conta






24. Produced when each meiotic division -rapidly degenerate






25. 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






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






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






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






29. 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






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






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






32. 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






33. Steroid hormones necessary for normal female maturation -stimulate the development of the female reproductive tract and contribute to the development of secondary sexual characteristics and sex drive -responsible for the thickening of the endometrium






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






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






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






37. 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






38. 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






39. Result when two ova are released in one ovarian cycle and are fertilized by two different sperm






40. A means of reproduction






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






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






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






44. Undifferentiated tissues in plants






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






46. First barrier that the sperm must penetrate -enzymes secreted by the sperm aid in penetration of the corona radiata -arosome is responsible for penetrating the zona pellucida; it releases enzymes that digest this layer - thereby allowing the sperm to






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






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






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






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