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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. A four-letter code made up of the DNA nitrogen bases A - T - G and C; each chromosome is made up of thousands of these bases






2. The exchange of parts of homologous chromosomes during meiosis






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






4. A cell in the retina that is sensitive to colors and is responsible for color vision






5. Multicellular organism






6. An ion with a positive charge - or an ion that migrates towards the cathode (negative electrode) in an electric field






7. A plant that has two seed leaves or cotyledons






8. An organ that stores urine temporarily before it is excreted






9. A fat-digesting hormone






10. A habitat zone - such as desert - grassland or tundra






11. Protective immunity to a disease in which the individual produces antibodies as a result of previous exposure to the antigen






12. Cells which in the female are located between the ovarian follicles and in the male are located between the seminiferous tubules of the testes






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






14. A process by which the cell membrane is invaginated to form a vesicle which contains extracellular medium






15. Blood protein that is transformed to fibrin upon clotting






16. An air sac in the lung; the site of respiratory exchange - involving diffusion of oxygen and carbon dioxide between the air in the alveolus and the blood in the capillaries






17. Tissue formed by the differentiation of cambium that causes a growth in width of a plant system






18. The stable - biotic part of the ecosystem in which populations exist in balance with each other and with the environment






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






20. 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






21. Any cell that is not a reproductive cell






22. An organ centrally involved in the human digestive system






23. A hormone that stimulates plant stem elongation






24. In plants - an area of undifferentiated tissue covered by embryonic leaves






25. An organism that utilizes the energy of inorganic materials such as water and carbon dioxide or the sun to manufacture organic materials






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






27. The enzyme released from the blood platelets in vertebrates during clotting






28. Occurs when different traits are inherited together more often than they would have been by chance along; it is assumed that these traits are linked on the same chromosome






29. A short - stubby rod consisting of chromatin that is found in the nucleus of the cells; contains the genetic or hereditary component of cells (in the form of genes)






30. An offspring that is heterozygous for one or more gene pairs






31. A space in the cytoplasm of a cell that contains fluid






32. A flesh-eating animal; a holotrophic animal that subsists on other animals or parts of animals






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






34. The intake of food from the environment into the alimentary canal






35. The instance of polymorphism in which there is a difference of form between two members of a species - as between males and females






36. Describes an individual that possesses two contrasting alleles for a given trait






37. An association of homologous chromosomes during the first meiotic division






38. A duct through which the urine passes from the bladder to the outside






39. A cell that divides to form two secondary spermatocytes






40. A kind of white blood cell in vertebrates that is characterized by a rounded nucleus; involved in the immune response






41. The study of the evolutionary descent and interrelations of groups of organisms






42. An association between an algae and a fungus that is symbiotic and mutualistic in nature






43. Pertaining to a type of gland that releases its secretion through a duct






44. A thin - transparent - eyelid-like membrane that opens and closes laterally across the cornea of many vertebrates (the third eyelid)






45. A kind of microorganism that is between a virus and a bacterium; parasitic within the cells of insects and ticks






46. A hoofed animal






47. The more muscular chamber(s) of the heart that pump blood to the lungs and to the rest of the body






48. A blood clot that is formed within a blood vessel






49. The orderly process by which one biotic community replaces another until a climax community is established






50. An embryonic structure that gives rise to the central nervous system