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






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






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






4. Organisms that manufacture their own food






5. In the ocean - the top layer thorugh which light can penetrate - is where all aquatic photosynthetic activity takes place






6. 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






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






8. Animals that consume dead animals






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






10. Developed long legs and many are hoofed






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






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






13. Rivers - lakes - ponds - and marshes






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






15. 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






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






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






18. Algae - sponges - clams - snails - sea urchins - starfish - and crabs






19. Animals eat the plants and synthesize specific animal proteins form the plant proteins. both plants and animals give off wastes and eventually die






20. Affect the type of vegetation that can be supported






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






22. Animals that eat both plants and animals






23. Determines water holding capacity






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






25. Individuals belonging to the same species use the same resources and if a particular resource is limited - then these organisms must compete with one another






26. Polar bears - musk oxen - and arctic hens






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






28. 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






29. The oceans






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






31. Community in an ecological succession is identified by a dominant species






32. 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






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






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






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






36. 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






37. Used to include only the population and not their physical environment






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






39. 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






40. 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






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






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






43. Animals eat plants and use the digested nutrients to form carbohydrates - fats - and proteins characteristic of the species. a part of these organic compounds is used as fuel in respiration in plants and animals






44. Conserve water actively






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






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






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






48. Without a constant input of energy from the sun - an ecosystem would soon run down - as food is transferred from one level of the food chain to the next - a transfer of energy occurs






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






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