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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. Conserve water actively






2. Encompasses all that is external to the organism and is necessary for its existence






3. The metabolically produced CO2 is released to the air. The rest of the orgnaic carbon remains locked whthin an organism until its death (except for wastes given off) - at which time decay processes by bacteria return the CO2 to the air






4. Body temperature is very close to that of their surroundings -as temperature rises - these organisms become more active






5. The study of interactions between organisms and their environment






6. Plants growing on other plants - trees grow closely together; sunlight hardly reaches the forest floor






7. The stable - living part of the ecosystem in whicih populations exist in balance with each other and with the environment






8. The oceans






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






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






11. Animals that consume primary consumers (carnivores)






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






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






14. One species may be competitively superior in some regions - and the other may be superior in other regions under different environmental conditions. this would result in the elimination of one species in some places and the other in other places






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






16. Monkeys - lizards - snakes - and birds - floor is inhabited by saprophytes






17. Polar bears - musk oxen - and arctic hens






18. Determines the nature of plant and animal life in the soil






19. Rock and soil surface






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






21. Only animal life and other heterotrophic life exists






22. Defines the functional role of an organism in its ecosystem -described what the organism eats - where and how it obtains its food - what climatic factors it can tolerate and which are optimal - the nature of its parasites and predators - where and ho






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






24. Evolve toward a balance in which the predator is a regulatory influence on th prey but not a threat to its survival






25. Affect the type of vegetation that can be supported






26. Links between oceans and land






27. Rivers - lakes - ponds - and marshes






28. Determines water holding capacity






29. 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






30. Animals that consume green plants (herbivores)






31. Cannot synthesize their ow food and must depend upon autotrophs or others in the ecosystem to obtain their food






32. Organisms that manufacture their own food






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






34. Deer - fox - woodchuck - and squirrel






35. Community in an ecological succession is identified by a dominant species






36. Animals that consume dead animals






37. 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






38. Contains plankton - passively drifting masses of microscopic photosynthetic and heterotrophic organisms - and nekton - and algae






39. Consists of populations of different plants and animal species interacting with each other in a given environment






40. More than 70% of earth -plants have little controlling influence in communities -most stable ecosystems; the conditions affecting temperature - amount of available oxygen and cabon dioxide - and amount of suspended or dissolve materials are very stab






41. Crawling and sessile organsms






42. Made into nitrites by chemosynthetic bacteria and then to usable nitrates by nitrifying bacteria






43. Rhododendrons and pines are more suited for growth in acid oil






44. 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






45. Vegetation such as vines and eppiphytes






46. Determine by the amount of decaying plant and animal life in the soil






47. Food chain is not a simple linear chain but an intricate web






48. Include those protists and fungi that decompose dead organic matter externally and absorb the nutrients - they consistitute a vital link in the cycling of material within the ecosystem






49. Freshwater Biomes vs. Saltwater 2: In rivers and streams - strong swift currents exist - and thus fish that have developed strong muscles and plants with _____________ have survived






50. Distinct community in a geographic region