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






2. 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






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






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






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






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






7. Deer - fox - woodchuck - and squirrel






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






9. Animals that feed on secondary consumer






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






11. 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






12. 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






13. Links between oceans and land






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






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






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






17. Vegetation such as vines and eppiphytes






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






19. Conserve water actively






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






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






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






23. Forest floors contain moss and lichens






24. Animals that eat both plants and animals






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






26. Rock and soil surface






27. Regiong beneatht he photic zone that receives no light






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






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






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






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






32. (living) includes all living things that directly or indirectly influence the life of the organism including the relationships that exist between organisms






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






34. Animals that consume primary consumers (carnivores)






35. 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






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






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






38. Include reproduction and protection from predators and destructive weather






39. Polar bears - musk oxen - and arctic hens






40. 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






41. 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






42. Symbiotic relationship from which both organisms derive some benefit






43. 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






44. The oceans






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






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






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






48. More than 70% of earth -plants have little controlling influence in communities -most stable ecosystems; the conditions affecting temperature - amount of available oxygen and cabon dioxide - and amount of suspended or dissolve materials are very stab






49. Lichens and moss






50. The study of interactions between organisms and their environment