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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. Vegetation such as vines and eppiphytes






2. Polar bears - musk oxen - and arctic hens






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






4. Animals that consume dead animals






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






6. One that exerts control over the other species that are present






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






8. Distinct community in a geographic region






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






10. Trees such as beech - maple - oaks - and willows shed their leaves during cold winters months






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






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






13. Treeless - frozen plain found between the taiga lands and the northern ice sheets - very short summer and thus a very short growing season during which time the ground becomes wet and marshy






14. Regiong beneatht he photic zone that receives no light






15. Animals that only eat other animals -possess pointed teeth and fang-like canine teeth for tearing flesh -have shorter digestive tracts because the easier digestibility of animal food






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






17. Determines water holding capacity






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






19. Jungles characterized by high temperatures and torrential rains -found in Central Africa - Central America - the Amazon basic - and Southeast Asia






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






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






22. Every energy transfer involves a loss of energy and each level of the food chain uses some of the energy it obtains from the food for its own metabolism and loses some additional energy in the form of heat






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






25. Links between oceans and land






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






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. 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






29. First to resettle a virgin area






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






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






32. In the ocean - the top layer thorugh which light can penetrate - is where all aquatic photosynthetic activity takes place






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






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






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






36. Animals that consume primary consumers (carnivores)






37. 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






38. Lichens and moss






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






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






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






42. Deer - fox - woodchuck - and squirrel






43. Animals that feed on secondary consumer






44. 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






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






46. Animals that consume green plants (herbivores)






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






48. Symbiotic relationship from which both organisms derive some benefit






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






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







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