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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. Include reproduction and protection from predators and destructive weather






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






3. Animals that consume primary consumers (carnivores)






4. Animals that eat both plants and animals






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






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






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






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






9. Vegetation such as vines and eppiphytes






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






11. Determines water holding capacity






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






13. An essential component of amino acids and nucleic acids - which are the building blocks of all living things






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






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






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






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






18. 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






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






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






21. Animals that feed on secondary consumer






22. Organisms that manufacture their own food






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






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






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






26. Adaptations for maintaining their internal osmolarity and conserving water






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






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






29. Conserve water actively






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






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






32. Only animal life and other heterotrophic life exists






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






34. 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






35. Characterized by low rainfall - although considerably more than the desert biomes receive -provide no shelter for herbivorous mammals from carnivorous predators -ex: East of the Rockies - steppes of the Ukraine - and the pampas of Argentina






36. Rock and soil surface






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






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






39. 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






40. 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






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






42. Affect the type of vegetation that can be supported






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






44. 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






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






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






47. The vegetation that becomes dominant and stable after years of evolutiionary development






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






49. The oceans






50. The ultimate source of energy for all organisms