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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. Needs constant energy source and cycling of materials between the living system






2. Only animal life and other heterotrophic life exists






3. Developed long legs and many are hoofed






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






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






6. 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






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






8. Animals that feed on secondary consumer






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






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






11. 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






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






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






14. 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






15. 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






16. Links between oceans and land






17. Forest floors contain moss and lichens






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






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






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






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






22. Adaptations for maintaining their internal osmolarity and conserving water






23. Deer - fox - woodchuck - and squirrel






24. Animals that consume primary consumers (carnivores)






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






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






27. Must be maintained at an optimal level -organisms have adaptations necessary for protection against extremes






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






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






30. Vegetation such as vines and eppiphytes






31. Rock and soil surface






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






33. Distinct community in a geographic region






34. Crawling and sessile organsms






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






36. Affect the type of vegetation that can be supported






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






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






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






40. The study of interactions between organisms and their environment






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






42. 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






43. The oceans






44. Algae - crabs - crustacea - and many different species of fish






45. Rivers - lakes - ponds - and marshes






46. 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






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






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






49. First to resettle a virgin area






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







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