Test your basic knowledge |

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






2. Include reproduction and protection from predators and destructive weather






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






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






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






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. Rock and soil surface






8. Elemental nitrogen is chemically inert and cannot be used by most organisms. Lightning and nitrogen-fixing bacteria in the roots of legumes change the nitrogen into the usable - soluble nitrates






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






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






11. 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






12. Forest floors contain moss and lichens






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






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






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






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






17. 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






18. The ultimate source of energy for all organisms






19. 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






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






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






22. 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






23. Include saprophytic organisms and organisms of decay






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






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






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






27. Only animal life and other heterotrophic life exists






28. 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






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






30. Adaptations for maintaining their internal osmolarity and conserving water






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






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






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






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






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






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






37. Animals that consume only plants or plant foods






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






39. An essential component of amino acids and nucleic acids - which are the building blocks of all living things






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






41. Recycle water - oxygen - and phosphorus






42. Deer - fox - woodchuck - and squirrel






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






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






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






46. 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






47. Rivers - lakes - ponds - and marshes






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






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






50. Animals that consume primary consumers (carnivores)