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






2. The pituitary gland.






3. Assumes that there are periods of stability during which little evolutionary change occurs - and that speciation can occur rapidly over a very short period of time.






4. The phylum of insects (bees).






5. Enzymes are usually __________ to certain reactions.






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






7. 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.






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






9. 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.






10. Provide rigidity to plant cells (and some bacteria) and are not found within animal cells.






11. Are the monomers that form nucleic acids - containing a sugar - phosphate group - and a nitrogenous base.






12. 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






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






14. The individual we recognize as an adult fern.






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






16. The systematic search for individuals with a specific genotype in a delineated population.






17. 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.






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






19. Plants and animals obtain usable nitrogen






20. The size of a cell is limited by the ratio of its surface area to volume.






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






22. Is the period when the cell is active in carrying on the function it was designed to perform within the organism. Cells spend much more time in interphase than in cell division.






23. Is when expression of genetic traits is determined by weather the trait is inherited from the mother or the father.






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






25. Developed by the German scientists Schleiden and Schwann - States that all living things are made of cells - cells are the basic units of life - all cells come from pre-existing cells.






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






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






28. All store energy within their chemical bonds.






29. 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.






30. Include: Vascular tissue - including both xylem and phloem - and sieve plates existing between cells of the stem.






31. Cleave strands of DNA segments at certain sites.






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






33. The sharp boundary of an ecosystem.






34. Are produced when water passes through the cell membrane by osmosis from an area of higher concentration to an area of lower concentration - to equalize water concentration.






35. The role played by an organism in its food chain.






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






37. Plants that produce flowers as reproductive organs. They have two divisions - monocots and dicots.






38. There was extensive radiation of fish during the Devonian and Silurian periods within the Paleozoic Era.






39. Secretes insulin to lower blood sugar and maintain equilibrium. A person eats three candy bars. Within minutes this endocrine gland affects blood-glucose homeostasis.






40. 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.






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






42. Anabolism






43. Niche






44. Is a packet of digestive enzymes that destroy cellular wastes.






45. (of some plants or fungi) feeding on dead or decaying organic matter






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






47. High temperatures






48. Breaking down






49. 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.






50. The vocal cords are found in the larynx.