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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. (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






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






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






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






5. 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






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






7. Result when a single zygote splits into two embryos






8. Eggs






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






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






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






12. Part of embryo that grows and feeds the embryo






13. 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 -






14. The embryonic undifferentiated cells that growth in higher plants are restricted to -undergo active cell reproduction






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






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. AKA lateral meristem -located between the xylem and phloem






18. 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






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






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






21. 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






22. 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






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






24. Mass of cells formed when the zygote divides






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






26. Common passageway for both the reproductive and exretory systems






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






28. Undergoes disjunction






29. Part of embry that are seed leaves






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






31. The site of sperm deposition during intercourse and is also the passageway through which a baby is expelled during childbirth






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






33. Production of offspring without fertilization -form new organisms by a single parent cell -offspring are genetic carbon copies of their parent cells -genetically identical to the parent cells (except mutations) -ex: fission - budding - regeneration -






34. A means of reproduction






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






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






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






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






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






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






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






42. Have two cotyledons that absorb the endosperm






43. AKA stolon -woody - underground stems -can develop new upright stems






44. Part of embryo that develops into the lower and root






45. Cell division that follows karyokinesis






46. (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






47. Egg






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






49. Sporophyte generation is the dominant - familiar form






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