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






2. Two species may rapidly evolve in divergent directions under the strong selection pressure resulting from intense competition. thus - the two species would rapidly evolve greater differences in their niches






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






4. Regiong beneatht he photic zone that receives no light






5. Animals that consume green plants (herbivores)






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






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






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






9. Symbiotic relationship from which both organisms derive some benefit






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






11. Include saprophytic organisms and organisms of decay






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






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






14. Include reproduction and protection from predators and destructive weather






15. The study of interactions between organisms and their environment






16. Animals that eat both plants and animals






17. 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






18. Characterized by low rainfall - although considerably more than the desert biomes receive -provide no shelter for herbivorous mammals from carnivorous predators -ex: East of the Rockies - steppes of the Ukraine - and the pampas of Argentina






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






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






21. 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






22. First to resettle a virgin area






23. 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






24. Animals that feed on secondary consumer






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






26. Distinct community in a geographic region






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






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






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






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






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






32. Animals that consume dead animals






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






34. Animals that consume primary consumers (carnivores)






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






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






37. 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






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






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






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






41. Conserve water actively






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






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






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






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






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






47. 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






48. The ultimate source of energy for all organisms






49. Deer - fox - woodchuck - and squirrel






50. The oceans