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






2. Developed long legs and many are hoofed






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. The major component of the internal environment of all living things






5. Deer - fox - woodchuck - and squirrel






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






7. The ultimate source of energy for all organisms






8. 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






9. Animals that eat both plants and animals






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






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






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






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






14. Includes the community and the environment and usually all five kingdoms






15. Algae - crabs - crustacea - and many different species of fish






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






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






18. Lichens and moss






19. Consumer organisms that are higher in hte food chain are usually larger and heavier than those further down






20. Two species may rapidly evolve in divergent directions under the strong selection pressure resulting from intense competition. thus - the two species would rapidly evolve greater differences in their niches






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






22. Forest floors contain moss and lichens






23. 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






24. Two fates await the ammonia (NH3). some are nitrified or dentrified






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






26. The chief disruptive force






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






28. Symbiotic relationship from which both organisms derive some benefit






29. Animals that consume only plants or plant foods






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






31. Regiong beneatht he photic zone that receives no light






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






33. The nitrogen locked up in the wastes and dead tissues is released by the action of the bacteria of decay - which convert the proteins into ammonia






34. 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






35. Free-living organisms that feed on other living organisms






36. Links between oceans and land






37. Crawling and sessile organsms






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






39. Affect the type of vegetation that can be supported






40. Evolved physical mechanisms that allow them to make Use of the heat produced as a consequence of respiratiion






41. Elemental nitrogen is chemically inert and cannot be used by most organisms. Lightning and nitrogen-fixing bacteria in the roots of legumes change the nitrogen into the usable - soluble nitrates






42. Determines water holding capacity






43. Animals eat the plants and synthesize specific animal proteins form the plant proteins. both plants and animals give off wastes and eventually die






44. 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






45. 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






46. Animals that consume primary consumers (carnivores)






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






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






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






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