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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. First to resettle a virgin area






2. Nitrates are absorbed by plants are used to syntheisze nucleic acids and plant proteins






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






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






5. 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






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






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






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






9. Symbiotic relationship from which both organisms derive some benefit






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






11. Determines water holding capacity






12. 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






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






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






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






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






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






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






19. 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






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






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






22. 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






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






24. 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






25. Distinct community in a geographic region






26. 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






27. Animals that consume only plants or plant foods






28. Developed long legs and many are hoofed






29. Rock and soil surface






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






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






32. Animals that consume dead animals






33. Deer - fox - woodchuck - and squirrel






34. 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






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






36. Conserve water actively






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






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






39. Recycle water - oxygen - and phosphorus






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






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






42. Include saprophytic organisms and organisms of decay






43. The study of interactions between organisms and their environment






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






45. Adaptations for maintaining their internal osmolarity and conserving water






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






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






48. 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






49. 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






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






Can you answer 50 questions in 15 minutes?



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