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






2. Links between oceans and land






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






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






5. Ammonia (NH3) is broken down to release free nitrogen - which returns to the beginning of the denitrifying






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






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






8. Include reproduction and protection from predators and destructive weather






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






10. 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






11. Animals that consume primary consumers (carnivores)






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






13. Polar bears - musk oxen - and arctic hens






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






15. 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






16. The metabolically produced CO2 is released to the air. The rest of the orgnaic carbon remains locked whthin an organism until its death (except for wastes given off) - at which time decay processes by bacteria return the CO2 to the air






17. 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






18. 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






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






20. Animals that consume only plants or plant foods






21. 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






22. Organisms that manufacture their own food






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






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






25. Affect the type of vegetation that can be supported






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






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






28. 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






29. Developed long legs and many are hoofed






30. Forest floors contain moss and lichens






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






32. Crawling and sessile organsms






33. Free-living organisms that feed on other living organisms






34. Lichens and moss






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






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






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






38. Deer - fox - woodchuck - and squirrel






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






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






41. The study of interactions between organisms and their environment






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






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






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






45. Determines water holding capacity






46. 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






47. Regiong beneatht he photic zone that receives no light






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






49. Animals that eat both plants and animals






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







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