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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. Covers and protects the leaf.






2. Breaking down






3. 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






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






5. Is the waxy protective outer coating of leaves.






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






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






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






10. Must be present for photosynthesis to occur - it is not used up in the process.






11. 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






12. Is a coenzyme required in the synthesis of collagen.






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






14. It secretes saliva which enters the digestive tract and aids the digestive process.






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






16. Are formed when the plasma membrane of a cell encloses a molecule outside the membrane - then releases a membrane bound sack containing the desired molecule into the cytoplasm. This process allows the cell to absorb molecules that are larger in size






17. Is an accidental change of the DNA sequence of the gene that can result in creating a change of trait that is not found in the parent.






18. Protein synthesis






19. The transfer of electrons.






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






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






22. This is a carboxyl group and is the signature group found within organic acids.






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






24. The destruction of gametes - (sex cells such as sperm and eggs).






25. What phylum are snakes in?






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






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






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






29. Cleave strands of DNA segments at certain sites.






30. An enzyme is unaffected by the reactions it catalyzes






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






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






33. 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.






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






35. Layer that will become the gut lining as well as some accessory structures.






36. 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.






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






38. Biotic (living) factors such as population and food source - and abiotic (non-living) factors such as weather - temperature - soil features - sunlight).






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






40. 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.






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






42. 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.






43. Covalent bonds






44. Contain organisms that are multicellular eukaryotes including vertebrates and invertebrates.






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






46. Is a compound fruit that develops from many ovaries of a single flower fusing together (raspberry).






47. Subsets below the kingdom level






48. Synthesis






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






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

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