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






2. High temperatures






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






4. 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.






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






6. Is the process that releases energy for use by the cell.






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






8. 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.






9. Is the sugar that lactase acts upon.






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






11. Plants and animals obtain usable nitrogen






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






13. 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.






14. Is a special protein that acts as a catalyst for organic reactions.






15. The trachea includes the windpipe or larynx in its upper portion - and the glottis - an opening that allows the gases to pass into the two branches known as the bronchi.






16. 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






17. Are surrounded by capillaries that allow for carbon dioxide to diffuse into the lungs and oxygen to diffuse out.






18. Occurs when an individual learns not to respond to a particular stimulus - for instance when a stimulus is repeated many times without consequence.






19. Some enzymes contain a __________ component that is essential to their functions.






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






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






22. The phylum of insects (bees).






23. Mitochondria - they constitute the center of cellular respiration.

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24. Refers to the birthrate of a population.






25. 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.






26. In DNA Thymine pairs with...






27. Niche






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






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






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






31. In both living and non-living environments.






32. 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.






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






34. Engages in both passive and active transport.






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






36. Controls balance and muscle coordination






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






38. Covalent bonds






39. Is the organelle where cellular reproductive processes occur.






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






41. 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.






42. Becomes available for erosion as undersea sedimentary rocks are up-thrust by volcanic activity - erosion releases it from rocks into streams where it combines with oxygen to form phosphates in lakes that are then absorbed by plants - it is recycled t






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






44. Is a kind of plain characterized by a warm climate - grassland - and seasonally dry climate conditions.






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






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






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






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






49. Transfers water and does not require sieve plates to allow nutrients through.






50. Disease causing







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