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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. The extraembryonic membrane in birds - reptiles and mammals that surrounds the embryo - forming an amniotic sac






2. An individual that is heterozygous for only one trait






3. A dense fluid within the chloroplast in which CO2 is converted into sugars in photosynthesis






4. Small - disc-shaped bodies in the blood that play a chief role in coagulation






5. A mall sex hormone (e.g. - testosterone)






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






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






8. Vascular tissue of the plant that aids in support and carries water






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






10. Changes in genes that are inherited






11. A pyrimidine component of nucleic acids and nucleotides; pairs with adenine in DNA






12. The solid ball of cells the results from cleavage of an egg; a solid blastula that precedes the blastula stage






13. A hoofed animal






14. A mutation involving the addition or loss of nucleotides






15. The area of medulla that regulates the rate of breathing






16. Describes two or more structures that have similar forms - positions and origins despite the differences between their current functions






17. A nuclear protein of chromosomes that stains readily






18. An emulsifying agent secreted by the liver






19. Compounds in bile that aid in emulsification






20. A waxy protective layer secreted by the outer surface of plants - insects - etcetera






21. Requiring free oxygen from the atmosphere for normal activity and respiration






22. Pertains to a gene or characteristic that is masked when a dominant allele is present






23. Passively floating or drifting flora and fauna of a body of water; consists mainly of microscopic organisms






24. The ourter part of the adrenal gland that secretes many hormones - including cortisone and aldosterone






25. A type of virus that can destroy bacteria by infecting - parasitizing and eventually killing them






26. An organic cofactor required for enzyme activity






27. A carbohydrate that is composed of many monosaccharide units joined together






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






29. The state in which two genetic traits are fully expressed and neither dominates






30. The portion of seed plant embryo above the cotyledon






31. A network - particularly of nerve or blood vessels






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






33. An organ that is not functional in an organism - but was functional at some period in its evolution






34. A plant growth hormone






35. A constituent of the plasma of the blood of vertebrates; it is converted to thrombin by thrombokinase in the presence of calcium ions - thus contributing to the clotting of blood






36. The organelle that provides mechanical support and carries out motility functions for the cell






37. The living together of two organisms in an intimate relationship






38. A specialized structure that controls osmotic pressure by removing water from the cell






39. A mature ovary






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






41. An undifferentiated - growing region of a plant that is constantly undergoing cell division and differentiation






42. A plant that has a single cotyledon or seed-leaf






43. The outer - transparent layer of the eye






44. The kind of bond formed when two amino acid units are jointed end to end






45. The dorsal part of the hip girdle






46. Asexual reproduction; in this process - the parent organism splits into two equal daughter cells






47. A nitrogen base that is present in nucleotides and nucleic acids; it is paired with guanine






48. The phylum to which segmented worms belong






49. A transmitter substance released from the axons of nerve cells at the synapse






50. Process of aerobic respiration that fully harvests the energy of glucose; also known as the citric acid cycle