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PCAT Biology Ecology

Subjects : pcat, 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. Used to include only the population and not their physical environment






2. Animals that consume primary consumers (carnivores)






3. Needs constant energy source and cycling of materials between the living system






4. Freshwater Biomes vs. Saltwater 1: Freshwater is _______________ which results in the passage of water into the cell. Freshwater organisms have homeostatic mechanisms to maintain water balance by the regular removal of the excess water. these include






5. Organisms that manufacture their own food






6. Chief animal inhabitant is the moose; however - the black bear - wolf - and some birds






7. Includes climate - temperature - availability of light and water - and the local topology






8. Polar bears - musk oxen - and arctic hens






9. Oceans connect to form one continuous body of water - which controls the earth's temperature by absorbing solar heat






10. Includes all portions of the planet that support life -the atmosphere - the lithosphere - and the hydrosphere






11. Must be maintained at an optimal level -organisms have adaptations necessary for protection against extremes






12. Determined by the same decisive factors-temperatures and rainfall






13. Only animal life and other heterotrophic life exists






14. Links between oceans and land






15. Affect the type of vegetation that can be supported






16. Rock and soil surface






17. Material is cycled and recycled betweenn organisms and their environments - passing from inorganic forms to organic forms and then back to the inorganic forms






18. Animals eat plants and use the digested nutrients to form carbohydrates - fats - and proteins characteristic of the species. a part of these organic compounds is used as fuel in respiration in plants and animals






19. Have cold winters - warm summers - and moderate rainfall -found in the Northeast and Central-Eastern United States and Central Europe






20. Animals that consume green plants (herbivores)






21. Have adaptations enabling them to survive in very cod water - with high pressures - and in complete darkness






22. Because organisms at the upper levels of the food chain derive their food energy from organisms at lower levels - and because energy is lost from one level to the next - each level can support a successively smaller biomass






23. One that exerts control over the other species that are present






24. The orderly process by which one biotic community replaces or succeeds another until a climax community is established






25. Vegetation has evolved adaptations for water conservation such as needle shaped leaves






26. Individuals belonging to the same species use the same resources and if a particular resource is limited - then these organisms must compete with one another






27. Distinct community in a geographic region






28. Freshwater Biomes vs. Saltwater 3: Freshwater biomes - except very large lakes - are affected by variations in _________. temperature of freshwater bodies varies considerably; they may freeze or dry up - and mud from their floors may be stirred up by






29. Frozen area with no vegetation and terrestrial animals -animals that do inhabit polar regions generally live near the polar oceans






30. Live in burrows had few birds and mammals are found except those which have developed adaptations for maintaining constant body temperatures






31. Individual unit of an ecological system - but the organism itself is composed of smaller units -organs >tissues >cells >molecules >atoms > subatomic particles






32. The chief disruptive force






33. Autotrophic green plants and chemosynthetic bacteria that use the energy of the sun and simple raw materials to manufacture carbohydrates - proteins - and lipids






34. Composed of populations that are able to exist under the new conditions






35. One or both organisms can't survive without the other






36. The study of interactions between organisms and their environment






37. Live together in an intimate - often permanent association - which may or may not be beneficial to both participants






38. Symbiotic relationship from which both organisms derive some benefit






39. Region on the continental shelf that contains ocean area with depths up to 600 feet and extends several hundred miles from the shores






40. When a parasite benefits at the expense of the host






41. Trees such as beech - maple - oaks - and willows shed their leaves during cold winters months






42. Lichens and moss






43. Nitrates are absorbed by plants are used to syntheisze nucleic acids and plant proteins






44. Gaseous CO2 enters the living world when plants use it to produce glucose via photosynthesis. The carbon atoms in CO2 are bonded to hydrogen and other carbon atoms. the plant uses the glucose to make starch - proteins - and fat






45. Each member of a food chain uses some of the energy it obtains from its food for its own metabolism and loses some additional energy in the form of heat






46. Region exposed to low tides that undergoes variations in temperature and periods of dryness






47. Energy is transferred from the original sources in green plants through a series o organisms with repeated stages of consumption and finally decomposition






48. Developed long legs and many are hoofed






49. Receive less rainfall than the temperate forests - have long - cold winters - and are inhabited by single coniferous tree-the spruce -extreme northern parts of Canada and Russia






50. The oceans







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