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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. Distinct community in a geographic region






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






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






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






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






6. Freshwater Biomes vs. Saltwater 3: Freshwater biomes - except very large lakes - are affected by variations in _________. temperature of freshwater bodies varies considerably; they may freeze or dry up - and mud from their floors may be stirred up by






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






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






9. Without a constant input of energy from the sun - an ecosystem would soon run down - as food is transferred from one level of the food chain to the next - a transfer of energy occurs






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






11. Animals that consume primary consumers (carnivores)






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






13. 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






14. Links between oceans and land






15. The chief disruptive force






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






17. Conserve water actively






18. Animals that consume only plants or plant foods






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






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






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






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






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






24. 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






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






26. Animals that consume green plants (herbivores)






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






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






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






30. Rivers - lakes - ponds - and marshes






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






32. Animals that consume dead animals






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






34. One that exerts control over the other species that are present






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






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






37. Determines water holding capacity






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






39. Include saprophytic organisms and organisms of decay






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






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






42. 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






43. Integrated system of species that are dependent upon one another for survival






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






45. Polar bears - musk oxen - and arctic hens






46. Nekton and benthos - scavengers - and predators (fiercely competitive)






47. The study of interactions between organisms and their environment






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






49. 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






50. Animals that eat both plants and animals