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






2. The chief disruptive force






3. Links between oceans and land






4. The oceans






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






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






7. One species may be competitively superior to the other and drive the second to extinction






8. Active swimmers such as fish - sharks - or whales that feed on plankton and smaller fish






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






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






11. The study of interactions between organisms and their environment






12. 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






13. The ultimate source of energy for all organisms






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






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






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






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






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






19. Animals that consume only plants or plant foods






20. 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






21. 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






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






23. Affect the type of vegetation that can be supported






24. Only animal life and other heterotrophic life exists






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






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






27. Group of organisms of the same species living together in a given location






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






29. Nutrients - water - and sunlight limitations aid in maintaining populations at relatively constant levels






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






31. Deer - fox - woodchuck - and squirrel






32. Forest floors contain moss and lichens






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






34. Jungles characterized by high temperatures and torrential rains -found in Central Africa - Central America - the Amazon basic - and Southeast Asia






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






36. 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






37. Developed long legs and many are hoofed






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






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






40. Polar bears - musk oxen - and arctic hens






41. 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






42. Animals that consume primary consumers (carnivores)






43. 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






44. Adaptations for maintaining their internal osmolarity and conserving water






45. Ammonia (NH3) is broken down to release free nitrogen - which returns to the beginning of the denitrifying






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






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






48. 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






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






50. Algae - sponges - clams - snails - sea urchins - starfish - and crabs