Test your basic knowledge |

SAT Subject Test: Biology

Subjects : sat, science, 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 recycling of nitrogen from decaying organism for use in future generations






2. A muscular valve regulating the flow of food from the stomach to the small intestine






3. Technology that allows for manipulation of genetic material






4. A pouched mammal - such as the kangaroo or opossum






5. The separation of some members of a population from the rest of their species; prevents interbreeding and may lead to the development of a new species






6. An accumulation of axons within the CNS that is white because it is fatty - myelin sheath






7. A tract of nerve fibers connecting the two cerebral hemispheres






8. A unit of heat; the amount of heat required to raise the temperature of one gram of water by one degree centigrade






9. The inner portion of the cytoplasm of a cell or the portion that surrounds the nucleus






10. An emulsifying agent secreted by the liver






11. Cycle in photosynthesis that reduces fixed carbon to carbohydrates through the addition of electrons ("dark cycle")






12. The largest artery; carries blood from the left ventricle






13. The removal of hydrogen or electrons from a compound or addition of oxygen; half of a redox (oxidation or reduction) process






14. A sex or reproductive cell that must fuse with another of the opposite type to form a zygote






15. The genetic makeup of an organism without regard to physical appearance






16. A condition in which an organism may have a multiple of the normal number of chromosomes (4n - 6n - etc)






17. Blood protein that is transformed to fibrin upon clotting






18. The functional role and position of an organism in an ecosystem; embodies every aspect of the organism's existence






19. Hormone active in osmoregulation; a mineral corticoid produced by the adrenal cortex; stimulates reabsorption of Na+ and secretion of K+






20. A network of membrane-enclosed spaces connected with the nuclear membrane; transports materials through the cell; can be soft or rough






21. A blood vessel that carries blood away from the heart






22. The chamber in the alimentary canal of certain vertebrates located below the large intestine - into which the ureter and reproductive organs empty (as in frogs)






23. Related to the sense of smell






24. One of the two strands that constitute a chromosome; chromatids are held together by the centromere






25. The female gamete; it is nonmotile - large in comparison to male gametes - and stores nutrients






26. Undifferentiated tissue in the stem of a plant that aids growth in width






27. A type of nuclear division that is characterized by complex chromosomal movement and the exact duplication of chromosomes; occurs in somatic cells






28. An opening in the eye whose size is regulated by the iris






29. The division in animal cell cytoplasm caused by the pinching in of the cell membrane






30. The vascular tissue of a plant that transports organic materials (photosynthetic products) from the leaves to other parts of the plant






31. Organism that produces its own food; first stage in the food chain






32. The fist stage of protein synthesis - in which the information coded in the DNA base is transcribed onto a strand of mRNA






33. A nitrogen base such as cytosine - thymine and uracil; when joined with sugar or phosphate - a component of nucleotides and nucleic acids






34. There are two kinds of sex chromosomes - X and Y; XX signifies a female and XY signifies a male






35. An organic cofactor required for enzyme activity






36. The ability of certain animals to regrow missing body parts






37. Protein threads that form in the blood during clotting






38. Three membranes that envelop the brain and spinal cord (pia mater - dura mater and arachnoid)






39. A dark-staining small body within the nucleus; composed of RNA






40. Fluid skeleton of annelids






41. The elimination of metabolic waster matter






42. Adrenaline






43. A structure that arises during mitosis and helps separate the chromosomes; composed of tubulin






44. An abbreviation of nicotinamide-adenine-dinucleotide-phosphate - also called TPN; an organic compound that serves as an oxidation-reduction molecule






45. An organism that is heterozygous for two different traits






46. The class of free-living flatworms






47. Plant growth stimulated by light (stem: + - towards light; root: - - away from light)






48. An abbreviation of nicotinamide-adenine-dinucleotide - also called DPN; a respiratory oxidation-reduction molecule






49. Random evolutionary changes in the genetic makeup of a population






50. Any physical feature that prevents the ecological niches of different organisms from overlapping