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






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






3. Adaptations for maintaining their internal osmolarity and conserving water






4. 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






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






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






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






8. Links between oceans and land






9. 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






10. Crawling and sessile organsms






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






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






13. Nitrates are absorbed by plants are used to syntheisze nucleic acids and plant proteins






14. Vegetation has evolved adaptations for water conservation such as needle shaped leaves






15. Symbiotic relationship from which both organisms derive some benefit






16. 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






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






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






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






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






21. Only animal life and other heterotrophic life exists






22. 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






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






24. 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






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






26. The oceans






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






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






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






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






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






32. The chief disruptive force






33. The ultimate source of energy for all organisms






34. Conserve water actively






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






36. Rivers - lakes - ponds - and marshes






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






38. First to resettle a virgin area






39. Organisms that manufacture their own food






40. Lichens and moss






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






42. 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






43. Include reproduction and protection from predators and destructive weather






44. 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






45. Trees such as beech - maple - oaks - and willows shed their leaves during cold winters months






46. In the ocean - the top layer thorugh which light can penetrate - is where all aquatic photosynthetic activity takes place






47. Affect the type of vegetation that can be supported






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






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






50. Polar bears - musk oxen - and arctic hens