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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. Controls olfactory lobes (smell)






2. Disease causing






3. Produce antibodies into the bloodstream that find and attach themselves to foreign antigens (toxins - bacteria).






4. Is composed of a double layer (bilayer) of phospholipids with protein globules imbedded within the layers. The construction of the membrane allows it to aid the function of the cell by permitting entrance and exit of molecules as needed by the cell.






5. 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.






6. In both living and non-living environments.






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






8. The total amount of genetic information available for a given species.






9. Are tubes constructed of a geometrical arrangement of microtubules in a pinwheel shape. Their function includes the formation of new microtubules - but is primarily to form the structural skeleton around which cells split during mitosis and meiosis.






10. Where protein synthesis occurs. They float unattached in the cytoplasm. They contain RNA that is specific to their function in protein formation.






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






12. Contains multicellular photosynthetic eukaryotic organisms including gymnosperms and angiosperms.






13. Fossilized burrows from multicellular organisms begin to appear in the geological record approximately 700 million years ago during the Precambrian period. These multicellular animals had only soft parts and could not be fossilized.






14. Super-class of vertebrae including organisms with jaws.






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






16. The phylum of insects (bees).






17. Is disorganized - unravelled - DNA with histones attached.






18. Is secreted by the adrenal cortex to promote sodium reabsorption in the kidney.






19. Covalent bonds






20. Approximately 7 - making it neither basic (under 7) nor alkaline (over 7).






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






22. Decomposition of living matter for consumption.






23. The process whereby cells build molecules and store energy (in the form of covalent chemical bonds).






24. In order to become an established part of an island ecosystem there must be a populations large enough to ensure _________ - a food source - a suitable habitat - and a source of moisture.






25. Is weaker than ionic - covalent - disulfide - or double bonds.






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






27. 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.






28. Energy transformations that occur as chemicals are broken down or synthesized within the cell.






29. A reaction that adds water to another compound. (2 hydrogens - 1 oxygen).






30. Is the sugar that lactase acts upon.






31. Most fossils of Hominids are from continents other than...






32. Produce adrenaline. This hormone is a well-known constrictor of blood vessels.






33. What phylum are snakes in?






34. Layer that will become the skin - some endocrine glands - and the nervous system.






35. The sharp boundary of an ecosystem.






36. Occurs when an individual from an adjacent population of the same species immigrates and breeds with a member of a previously locally isolated group - resulting in a change in the gene pool.






37. An orienting response to light.






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






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






40. Nonvascular plants such as mosses which lack tissue for conducting food or water.






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






42. Plants and animals obtain usable nitrogen






43. Consists of undifferentiated cells capable of quick growth and specialization. It is responsible for elongation of the stem.






44. Anabolism






45. The pituitary gland.






46. Bacteria break ammonia into nitrites - then into nitrates that are usable by plants; volcanic activity produces ammonia and nitrates that enter the soil and can be absorbed by plants; lightning reacts with atmospheric nitrogen to form nitrates that a






47. When stems bend toward the light it is due to _____________ the hormone auxin - in response to light - migrates from the light to the dark side of the shoot tip. The cells on the dark side now contain more auxin - which causes the cells on that side






48. States that where random mating is occurring within a population that is in equilibrium with its environment - the gene frequencies and genotype ratios will remain constant from generation to generation. It is a mathematical formula that shows why re






49. Chlorophyll pigments absorb photons of light - leaving the chlorophyll in a higher energy (excited) state - these then supply energy to reactions that produce ATP from ADP and Pi.






50. Enzymes are usually __________ to certain reactions.