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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. Determined by the same decisive factors-temperatures and rainfall






2. 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






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






4. Only animal life and other heterotrophic life exists






5. Crawling and sessile organsms






6. Determines water holding capacity






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






8. First to resettle a virgin area






9. 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






10. Affect the type of vegetation that can be supported






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






12. 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






13. Conserve water actively






14. Animals that feed on secondary consumer






15. 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






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






17. Rivers - lakes - ponds - and marshes






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






19. The oceans






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






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






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






23. 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






24. Distinct community in a geographic region






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






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






27. Lichens and moss






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






29. Freshwater Biomes vs. Saltwater 3: Freshwater biomes - except very large lakes - are affected by variations in _________. temperature of freshwater bodies varies considerably; they may freeze or dry up - and mud from their floors may be stirred up by






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






31. Organisms that manufacture their own food






32. Regiong beneatht he photic zone that receives no light






33. Forest floors contain moss and lichens






34. Animals that consume only plants or plant foods






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






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






37. 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






38. Rock and soil surface






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






40. 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






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






42. 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






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






44. 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






45. Vegetation such as vines and eppiphytes






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






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






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






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






50. 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






Can you answer 50 questions in 15 minutes?



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