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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. Crawling and sessile organsms






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






3. 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






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






5. Affect the type of vegetation that can be supported






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






7. The study of interactions between organisms and their environment






8. Include reproduction and protection from predators and destructive weather






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






10. 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






11. 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






12. Animals that consume dead animals






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






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






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






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






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






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






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






20. 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






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






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






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






24. 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






25. Links between oceans and land






26. 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






27. The oceans






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






29. 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






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






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






32. 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






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






34. 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






35. Only animal life and other heterotrophic life exists






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






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






38. 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






39. Lichens and moss






40. Developed long legs and many are hoofed






41. Animals that feed on secondary consumer






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






43. Deer - fox - woodchuck - and squirrel






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






45. Forest floors contain moss and lichens






46. Adaptations for maintaining their internal osmolarity and conserving water






47. Organisms that manufacture their own food






48. 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






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






50. Symbiotic relationship from which both organisms derive some benefit