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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 chemical messenger that is secreted by one part of the body and carried by the blood to affect another part of the body - usually a muscle or gland






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






3. A nitrogenous base such as adenine or guanine; when joined with sugar or phosphate - a component of nucleotides and nucleic acids






4. The movement of particles from one place to another as a result of their random motion






5. In plants - the tissue between the epidermis and the vascular cylinder in the roots and stems of plants; in animals - the outer tissue of some organs






6. The science of classification of living things






7. The individual differences of form among the members of a species






8. An organic molecule consisting of joined phosphate - 5-carbon sugar (deoxyribose or ribose) - and a purine or a pyrimidine (adenine - guanine - uracil - thymine or cytosine)






9. A substance that participates in the clotting of blood in vertebrates






10. The central tissue of a stem - used for food storage






11. The basal branch of each spinal nerve; carries motor neurons






12. A kingdom of unicellular living organisms that are neither animals nor plants; includes some groups of algae - slime molds and protozoa






13. A symbiotic relationship from which both organisms involved derive some benefit






14. 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)






15. A body fluid that flows in its own circulatory fluid in lymphatic vessels separate from blood circulation






16. An organism that is heterozygous for two different traits






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






18. Adrenaline






19. A green pigment that performs essential functions as an electron donor and light "entrapper" in photosynthesis






20. A ring-shaped muscle that is capable of closing a tubular opening by constriction






21. The most anterior portion of the small intestine of vertebrates - adjacent to the stomach; the continuation of the stomach into which the bile duct and pancreatic duct empty






22. A duct that carries urine from the kidneys to the bladder






23. Describes an individual that has the same gene for the same trait on each homologous chromosome






24. The ability of an organism to contribute its alleles and therefore is phenotypic traits to future generations






25. A microscopic opening located in the epidermis of a leaf and formed by a pair of guard cells






26. A stage of embryonic development characterized by the differentiation of the cells into the ectoderm and endoderm germ layers and by the formation of the archenteron






27. The innermost embryonic germ layer that gives rise to the lining of the alimentary canal and to the digestive and respiratory organs






28. A hoofed animal






29. A nerve fiber






30. The thin-walled anterior chamber of the heart (also called the auricle)






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






32. A sugar composed of two combined monosaccharides






33. The sensory branch of each spinal nerve






34. A grouping of neuron cell bodies that acts as a coordinating center






35. Multicellular organism






36. The inner part of the adrenal gland that secretes adrenalin






37. A plant-eating animal






38. A section of the posterior forebrain associated with the pituitary gland






39. The outermost surface of an organism






40. The outermost - extra-embryonic membrane of reptiles and birds






41. A stage of embryonic development in which the embryo consists of a hollow ball of cells






42. The portion of a DNA molecule that serves as a unit of heredity; found on the chromosome






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






44. An organic catalyst and protein






45. A neuron that picks up impulses from receptors and transmits them to the spinal cord






46. An organism that obtains its nutrients from dead organisms






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






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






49. A typical coelenterate individual with a hollow tubular body whose outer ectoderm is separated from its inner ectoderm by mesoglea






50. The haploid - sexual stage in the life cycle of plants