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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. 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






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. Animals that consume only plants or plant foods






4. Symbiotic relationship from which both organisms derive some benefit






5. Include reproduction and protection from predators and destructive weather






6. The major component of the internal environment of all living things






7. 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






8. Animals that consume dead animals






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






10. Include saprophytic organisms and organisms of decay






11. Links between oceans and land






12. Regiong beneatht he photic zone that receives no light






13. Live together in an intimate - often permanent association - which may or may not be beneficial to both participants






14. Affect the type of vegetation that can be supported






15. Animals that consume green plants (herbivores)






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






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






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






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






20. Conserve water actively






21. 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






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






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






24. Distinct community in a geographic region






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






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






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






28. The oceans






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






30. Lichens and moss






31. 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






32. Polar bears - musk oxen - and arctic hens






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






34. 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






35. Body temperature is very close to that of their surroundings -as temperature rises - these organisms become more active






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






37. Recycle water - oxygen - and phosphorus






38. Vegetation such as vines and eppiphytes






39. Determines water holding capacity






40. First to resettle a virgin area






41. 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






42. 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






43. Animals that feed on secondary consumer






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






45. Rock and soil surface






46. Crawling and sessile organsms






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






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






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






50. Made into nitrites by chemosynthetic bacteria and then to usable nitrates by nitrifying bacteria