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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. Reproductive structure of angiosperms






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






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






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






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






6. Thin and stalk like with a terminal sac called the anther






7. 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






8. 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






9. 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






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






11. Produces monoploid spores that develop into pollen grains






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






13. Diploid cells of spermatogonia






14. 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






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






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






17. Result when a single zygote splits into two embryos






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






19. AKA sperm production -occurs in the seminiferous tubules






20. Undergoes disjunction






21. Secretes estrogen and progesterone






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






23. Regrowth of a lost or injured body part






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






25. Replication of the nucleus followed by unequal cytokinesis -membrane pinches inward to forma new cell that is smaller in size but genetically identical to the parent cell






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






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






28. Female gonads that produce oocytes






29. Produced when each meiotic division -rapidly degenerate






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






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






32. 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






33. Nuclear division and followed by cell division






34. Egg






35. Uncoiled DNA






36. Large cell containing most of the cytoplasm - RNA - organelles - and nutrients needed by a developing embryo






37. 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






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






39. Mass of cells formed when the zygote divides






40. Stems running above and along the gorund - extending form the main stem -can produce new roots and upright stems






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






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






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






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






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






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






47. Have one cotyledon






48. Hormonal secretions of the ovaries - the hypothalamus - and the anterior pituitary play important roles in the female reproductive cycle -divided into the follicular phase - ovulation - the luteal phase - and menstruation






49. Formed due to cortical reaction -hard layer that surrounds the ovum cell membrane and prevents multiple fertilizations -Followed by the fusion of sperm nucleus and form a diploid zygote






50. Ex: estrogens and progesterone -synthesized by ovaries