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






2. Sunlit layer of the open sea extending to a depth of 250-600ft






3. The study of interactions between organisms and their environment






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






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






6. 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






7. Distinct community in a geographic region






8. Animals that eat both plants and animals






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






10. First to resettle a virgin area






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






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






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






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






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






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






17. 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






18. Animals that consume primary consumers (carnivores)






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






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






21. Include reproduction and protection from predators and destructive weather






22. 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






23. 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






24. Forest floors contain moss and lichens






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






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






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






28. 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






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






30. Animals eat the plants and synthesize specific animal proteins form the plant proteins. both plants and animals give off wastes and eventually die






31. Regiong beneatht he photic zone that receives no light






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






33. 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






34. Defines the functional role of an organism in its ecosystem -described what the organism eats - where and how it obtains its food - what climatic factors it can tolerate and which are optimal - the nature of its parasites and predators - where and ho






35. Gaseous CO2 enters the living world when plants use it to produce glucose via photosynthesis. The carbon atoms in CO2 are bonded to hydrogen and other carbon atoms. the plant uses the glucose to make starch - proteins - and fat






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






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






38. 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






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






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






41. Conserve water actively






42. Recycle water - oxygen - and phosphorus






43. Animals that consume only plants or plant foods






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






45. Include saprophytic organisms and organisms of decay






46. 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






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






48. Links between oceans and land






49. Cold - dry - and inhabited by fir - pine - and spruce trees -much vegetation has evolved adaptations for water conservation such as needle-shaped leaves -Extreme Northern Part of the US and in Southern Canada






50. Crawling and sessile organsms