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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. When one organism is benefited by the association and the other is not affected






2. Forest floors contain moss and lichens






3. Animals that consume only plants or plant foods






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






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






6. 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






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






8. Conserve water actively






9. Animals that consume green plants (herbivores)






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






11. Region typical of the open seas and can be divided into photic and aphotic zones






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






13. Any group of similar organisms that are capable of reproducing






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






15. Animals that consume dead animals






16. Deer - fox - woodchuck - and squirrel






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






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






19. 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






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






21. Treeless - frozen plain found between the taiga lands and the northern ice sheets - very short summer and thus a very short growing season during which time the ground becomes wet and marshy






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






23. Used to include only the population and not their physical environment






24. Include reproduction and protection from predators and destructive weather






25. 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






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






27. Developed long legs and many are hoofed






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






29. Rivers - lakes - ponds - and marshes






30. Only animal life and other heterotrophic life exists






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






32. First to resettle a virgin area






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






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






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






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






37. Every energy transfer involves a loss of energy and each level of the food chain uses some of the energy it obtains from the food for its own metabolism and loses some additional energy in the form of heat






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






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






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






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






42. Recycle water - oxygen - and phosphorus






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






44. (living) includes all living things that directly or indirectly influence the life of the organism including the relationships that exist between organisms






45. 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






46. The ultimate source of energy for all organisms






47. Links between oceans and land






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






49. Determines water holding capacity






50. The chief disruptive force