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






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






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






4. First to resettle a virgin area






5. One species may be competitively superior to the other and drive the second to extinction






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






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






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






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






10. Animals that consume green plants (herbivores)






11. Links between oceans and land






12. Adaptations for maintaining their internal osmolarity and conserving water






13. Monkeys - lizards - snakes - and birds - floor is inhabited by saprophytes






14. Deer - fox - woodchuck - and squirrel






15. Because organisms at the upper levels of the food chain derive their food energy from organisms at lower levels - and because energy is lost from one level to the next - each level can support a successively smaller biomass






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






17. Symbiotic relationship from which both organisms derive some benefit






18. Animals that consume only plants or plant foods






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






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






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






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






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






24. 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






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






26. Include reproduction and protection from predators and destructive weather






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






28. Polar bears - musk oxen - and arctic hens






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






30. 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






31. Organisms that manufacture their own food






32. Gaseous CO2 enters the living world when plants use it to produce glucose via photosynthesis. The carbon atoms in CO2 are bonded to hydrogen and other carbon atoms. the plant uses the glucose to make starch - proteins - and fat






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






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






35. Animals that consume primary consumers (carnivores)






36. Integrated system of species that are dependent upon one another for survival






37. Animals that feed on secondary consumer






38. Region typical of the open seas and can be divided into photic and aphotic zones






39. Without a constant input of energy from the sun - an ecosystem would soon run down - as food is transferred from one level of the food chain to the next - a transfer of energy occurs






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






41. 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






42. Conserve water actively






43. 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






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






45. 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






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






47. Vegetation has evolved adaptations for water conservation such as needle shaped leaves






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






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






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