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






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






3. The sharp boundary of an ecosystem.






4. 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.






5. Controls hunger and thirst






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






7. The large brain and upright posture of Homo Sapiens...






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






9. Breaking down






10. 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.






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






12. The phyla of sponges.






13. 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.






14. Enzymes are usually __________ to certain reactions.






15. Synthesis






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






17. 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.






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






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






20. Is a kingdom that includes algae and protozoa.






21. Contains optic lobes - controls sight.






22. 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.






23. Allows for the genetic code to be preserved in future generations of cells.






24. Is composed of an anterior and posterior lobe. The stalk of the lobe is connected to the hypothalamus. Antidiuretic Hormone (AH) is produced in the hypothalamus and stored in the posterior pituitary. Upon nervous stimulation from the hypothalamus - t






25. An enzyme is unaffected by the reactions it catalyzes






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






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. 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.






29. 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.






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






31. Ended with the extinction of the dinosaurs.






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






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






34. The class composed of birds.






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






36. Disease causing






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






38. 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.






39. The cells of a developing embryo (at the gastrula stage) differentiate into layers - that will later develop into different tissues and organs - including the mesoderm - ectoderm - and endoderm.






40. Is the sugar that lactase acts upon.






41. Is very rare and is not absorbed by plant leaves. Phosphorous is nearly always found in solid form.






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






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






44. Inorganic phosphate






45. Contains the chromosomes and is the site of reproduction through mitosis and meiosis.






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






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






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






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






50. The lineage that led to the modern Homo Sapiens diverged from the lineage that led to the modern chimpanzee.






Can you answer 50 questions in 15 minutes?



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