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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 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.






2. 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.






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






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






5. The number of organisms in a given community - can be above or below the carrying capacity.






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






7. Refers to the birthrate of a population.






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






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






10. The phyla of round worms.






11. Veins in the leaf and are also distributed throughout the stem






12. Produce adrenaline. This hormone is a well-known constrictor of blood vessels.






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






14. Includes all living and nonliving components of the Earth to support living things.






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






16. Are more closely related to Homo Sapiens than to other apes - but Homo Sapiens did not evolve from chimpanzees.






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






18. 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






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






20. Niche






21. Is the outermost of the three main layers of an embryo.






22. Are cells involved in immunity and are produced in bone marrow as stem cells.






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






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






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






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






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






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






29. Contains many genes and is a structure comprised of linear DNA and associated proteins.






30. Carbon - Hydrogen - Oxygen - and Nitrogen






31. Process in which elements - chemical compounds - and other forms of matter are passed from one organism to another and from one part of the biosphere to another.






32. Ended with the extinction of the dinosaurs.






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






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






35. Is the major component of sand and is the most abundant element found in the lithosphere. It is not recycled.






36. May be ions or non-protein molecules - they are similar to cofactors - but differ in that they are tightly attached by covalent bonds to the enzyme - rather than being separate atoms or molecules.






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






38. Has loosely packed cells that allow for gas and moisture exchange.






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






40. Nonvascular plants such as mosses which lack tissue for conducting food or water.






41. 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.






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






43. Consists of undifferentiated cells capable of quick growth and specialization. It is responsible for elongation of the stem.






44. Disease causing






45. Are the organelles where cellular respiration occurs.






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






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






48. 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






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






50. 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.