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






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






3. 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






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






5. 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.






6. The sharp boundary of an ecosystem.






7. Energy transformations that occur as chemicals are broken down or synthesized within the cell.






8. 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.






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






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






11. The preservation of the integrity of genetic information from one generation to another.






12. The phyla of sponges.






13. Contains optic lobes - controls sight.






14. Disease causing






15. The phyla of round worms.






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






17. Is the control of protein synthesis. Genetic traits are expressed and specialization of cells occur as a result of the combination of proteins produced by the DNA of a cell.






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






19. Transparency - polarity - high specific heat - and density (lower density when solid than when liquid.).






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






21. States that where random mating is occurring within a population that is in equilibrium with its environment - the gene frequencies and genotype ratios will remain constant from generation to generation. It is a mathematical formula that shows why re






22. Cleave strands of DNA segments at certain sites.






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






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






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






26. 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.






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






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






29. Is a disease caused by lack of vitamin C in which the body is unable to build enough collagen (a major component of connective tissue).






30. In DNA Guanine pairs with...






31. 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.






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






33. Are easily converted to ATP - but the main energy products of the Krebs cycle liberate electrons then used in the electron transfer reactions.






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






35. 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.






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






37. Is more like branching out of a tree with dead ends and new branches appearing simultaneously than like steps on a ladder.






38. The most recent and present era. It includes the radiation of flowering plants - the angiosperms.






39. Enzymes are usually __________ to certain reactions.






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






41. Is the outermost layer of cells of the stem.






42. Ended with the extinction of the dinosaurs.






43. When the water concentration inside and outside the cell is equal - It is said to be in an...






44. In both living and non-living environments.






45. Fruits that develop from a single ripened ovary (apple - olive - acorn - cucumber).






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






47. All store energy within their chemical bonds.






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






49. The individual we recognize as an adult fern.






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