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. Conserve water actively






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






3. Cold - dry - and inhabited by fir - pine - and spruce trees -much vegetation has evolved adaptations for water conservation such as needle-shaped leaves -Extreme Northern Part of the US and in Southern Canada






4. 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






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






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






7. Distinct community in a geographic region






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






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






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






11. 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






12. Energy is transferred from the original sources in green plants through a series o organisms with repeated stages of consumption and finally decomposition






13. First to resettle a virgin area






14. Lichens and moss






15. 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






16. 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






17. Organisms that manufacture their own food






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






19. 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






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






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






22. 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






23. Regiong beneatht he photic zone that receives no light






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






25. 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






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






27. Include reproduction and protection from predators and destructive weather






28. Determines water holding capacity






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






30. 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






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






32. 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






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






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






35. Plants growing on other plants - trees grow closely together; sunlight hardly reaches the forest floor






36. Rock and soil surface






37. Developed long legs and many are hoofed






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






39. Jungles characterized by high temperatures and torrential rains -found in Central Africa - Central America - the Amazon basic - and Southeast Asia






40. Adaptations for maintaining their internal osmolarity and conserving water






41. The oceans






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






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






44. 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






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






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






47. Only animal life and other heterotrophic life exists






48. 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






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






50. 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