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CLEP Biology

Subjects : clep, 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. Super-class of vertebrae including organisms with jaws.






2. A sex-linked recessive disorder carried on the x chromosome in which an individual cannot perceive certain colors.






3. The physical place where a particular organism lives. It must include all the factors that will support its life and reproduction.






4. The class composed of birds.






5. Is an abundant element found in protoplasm. Together with oxygen - hydrogen - and nitrogen - it composes over 90% of cellular structure.






6. Produces the most ATP molecules - yielding 34 ATPs per glucose molecule.






7. Has loosely packed cells that allow for gas and moisture exchange.






8. May be ions or non-protein molecules - they are similar to cofactors - but differ in that they are tightly attached by covalent bonds to the enzyme - rather than being separate atoms or molecules.






9. Is the outermost of the three main layers of an embryo.






10. Some patrol the blood for antigens - but are also equipped to destroy antigens. They may regulate immune responses as well.






11. Contains many genes and is a structure comprised of linear DNA and associated proteins.






12. Is the number of organisms that can be supported within a particular ecosystem.






13. The effect of a substrate concentration on the initial reaction rate in the presence of a limited amount of enzyme: _________________ as the concentration of substrate is increased until all the enzymes are used - then the reaction rate will level of






14. Covers and protects the leaf.






15. Is the waxy protective outer coating of leaves.






16. Is the earliest period of the Paleozoic era. Began with the Cambrian explosion - this explosion of life resulted in the representatives of most of the modern phyla being present.






17. Is a social behavior of an organism that is beneficial to the group at the individual's expense.






18. Controls hunger and thirst






19. Niche






20. Must be present for photosynthesis to occur - it is not used up in the process.






21. Is the sugar that lactase acts upon.






22. Occurs when two populations are geographically isolated from each other. Over time this results in the production of two separate species.






23. Digestive enzymes - hydrochloric acid - and gastric juices which aid in digestion. The mucous secreted by the stomach protects the stomach lining from the acids and juices.






24. The bronchi lead to the two lungs where they branch out in all directions into smaller tubules known as bronchioles.






25. Are organic cofactors or coenzymes that are required by some enzymatic reactions.






26. Sex-linked recessive disorder carried on the x chromosome defined by the absence of one or more proteins required for blood clotting






27. The pituitary gland.






28. Is comprised of all the organisms that interact within a given ecosystem whether or not it is at carrying capacity.






29. The destruction of gametes - (sex cells such as sperm and eggs).






30. Most chemical pollutants accidentally ingested by humans are __________ - mixed with broken down pigments in the bile - then bile is secreted into the small intestine - proceeds to the large intestine - and is expelled in the feces.






31. Is a phylum that contains jellyfish - hydra - etc.






32. Includes all living and nonliving components of the Earth to support living things.






33. Is the outermost layer of cells of the stem.






34. Are cells involved in immunity and are produced in bone marrow as stem cells.






35. Can be accounted for by the theory of punctuated equilibrium. The fossil record shows periods of stability with regard to appearance and disappearance of species as well as periods of sudden change.






36. Are easily converted to ATP - but the main energy products of the Krebs cycle liberate electrons then used in the electron transfer reactions.






37. Between the endoderm and ectoderm - layer that will eventually form the muscles - and organs of the skeletal - circulatory - respiratory - reproductive - and excretory systems.






38. Is a molecule that stores information for protein synthesis and genetic coding.






39. Some energy is lost as heat and becomes unusable.






40. Has extreme hot or cold temperatures - with very low precipitation - sandy or rocky terrain - sparse vegetation (mainly succulents) - small animals - rodents - and reptiles.






41. Are where the sugars synthesized by photosynthesis travel through to various parts of the plant.






42. Is a substance that changes the speed of a reaction without being affected itself.






43. Process in which elements - chemical compounds - and other forms of matter are passed from one organism to another and from one part of the biosphere to another.






44. When the water concentration inside and outside the cell is equal - It is said to be in an...






45. Contain one celled eukaryotes such as algae and protozoa.






46. Inorganic phosphate






47. Controls sensory and motor responses - and controls memory - speech - and intelligence factors.






48. All store energy within their chemical bonds.






49. The solid mass of cells resulting from the cleavage of the ovum before the formation of a blastula.






50. The part of the earth that contains all living things - including the atmosphere (air) - the lithosphere (earth) - and the hydrosphere (water).