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






2. 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






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






4. Is the waxy protective outer coating of leaves.






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. Is a protein - which is a polymer of amino acids. They generally have the suffix -ase- like lactase.






7. An opportunistic life strategy strategy. Lichens invading a bare rock area after a volcanic eruption is an example.






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






9. 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






10. Protein synthesis






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






12. Stood upright before there was an increase in brain size.






13. Small - green - heart-shaped gametophyte plant form of a fern that can make its own food and absorb water and nutrients from the soil






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






15. Is the organelle where cellular reproductive processes occur.






16. A length of DNA (with corresponding histones) is responsible for the production of a certain protein that causes a particular trait to be expressed in an organism.






17. The phyla composed of segmented worms.






18. Is a compound fruit that forms from several ovaries of separate flowers that fuse together during ripening (strawberry - or pineapple).






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






20. Are membrane-bound organelles that contain digestive enzymes that digest dead or unused material within the cell or materials absorbed by the cell for use.






21. Synthesis






22. 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






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






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






25. 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.






26. Mass extinctions promote diversification because _______________ - making conditions favorable for the establishment of new - diverse species.






27. In both living and non-living environments.






28. Is more like branching out of a tree with dead ends and new branches appearing simultaneously than like steps on a ladder.






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






30. Has extreme cold temperatures - low precipitation - modified grassland - perma-frost - a short growing season and some plants and animals.






31. Internally generated patterns of body functions - including hormonal signals - sleep - blood pressure - and temperature regulation - which have approximately a 24-hour cycle and occur even in the absence of normal cues about whether it is day or nigh






32. An orienting response to light.






33. Refers to the birthrate of a population.






34. Carbon - nitrogen - phosphorous - and water. These are all recycled through biogeochemical processes.






35. The pharynx is between the nasal passage and the trachea. Air passes into the body via the nasal passage - then passes through the pharynx and on to the trachea.






36. Contains organisms that are multicellular eukaryotes including molds and mushrooms.






37. Channels is cell membranes that carry water between cells.






38. Is a behavior that is learned during a critical point (often very early) in an individual's life. Imprinting enables the young the recognize members of their own species.






39. Is the control of protein synthesis. Genetic traits are expressed and specialization of cells occur as a result of the combination of proteins produced by the DNA of a cell.






40. Controls olfactory lobes (smell)






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






42. A hydrogen bond involves the ________________ and can be easily broken.






43. Is found in the root cap and is responsible for quick growth in the roots.






44. An enzyme is unaffected by the reactions it catalyzes






45. Is a phylum that contains sponges.






46. Plants and animals obtain usable nitrogen






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






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






49. Attaches to an enzyme and blocks the enzyme reaction rather than enhancing it - like a prosthetic group would.






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







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