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






2. Receive less than ten inches of rain each year; the rain is concentrated within a few heavy cloudbursts -ex: Sahara in Africa and Gobi in Asia






3. Freshwater Biomes vs. Saltwater 2: In rivers and streams - strong swift currents exist - and thus fish that have developed strong muscles and plants with _____________ have survived






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






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






6. Recycle water - oxygen - and phosphorus






7. Include saprophytic organisms and organisms of decay






8. 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






9. Vegetation such as vines and eppiphytes






10. Animals that feed on secondary consumer






11. 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






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






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






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






15. Adaptations for maintaining their internal osmolarity and conserving water






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






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






18. Energy is transferred from the original sources in green plants through a series o organisms with repeated stages of consumption and finally decomposition






19. Rock and soil surface






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






21. Community in an ecological succession is identified by a dominant species






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






23. First to resettle a virgin area






24. Must be maintained at an optimal level -organisms have adaptations necessary for protection against extremes






25. 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






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






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






28. Includes the community and the environment and usually all five kingdoms






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






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






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






32. 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






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






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






35. 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






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






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






38. Only animal life and other heterotrophic life exists






39. Symbiotic relationship from which both organisms derive some benefit






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






41. Rivers - lakes - ponds - and marshes






42. Forest floors contain moss and lichens






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






44. 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






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






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






47. Conserve water actively






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






49. Polar bears - musk oxen - and arctic hens






50. 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







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