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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. Affect the type of vegetation that can be supported






2. 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






3. Deer - fox - woodchuck - and squirrel






4. 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






5. Forest floors contain moss and lichens






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






7. Cannot synthesize their ow food and must depend upon autotrophs or others in the ecosystem to obtain their food






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






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






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






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






12. Links between oceans and land






13. 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






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






15. 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






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






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






18. 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






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






20. Rock and soil surface






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






22. 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






23. Determines water holding capacity






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






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






26. Animals that eat both plants and animals






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






28. 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






29. 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






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






31. 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






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






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






35. First to resettle a virgin area






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






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






38. Polar bears - musk oxen - and arctic hens






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






40. Animals that feed on secondary consumer






41. Recycle water - oxygen - and phosphorus






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






43. 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






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






45. Regiong beneatht he photic zone that receives no light






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






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






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






49. 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






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