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






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






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






4. 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






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






6. 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






7. 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






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






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






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






11. The ultimate source of energy for all organisms






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






13. Consumer organisms that are higher in hte food chain are usually larger and heavier than those further down






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






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






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






17. Animals that consume only plants or plant foods






18. 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






19. Include those protists and fungi that decompose dead organic matter externally and absorb the nutrients - they consistitute a vital link in the cycling of material within the ecosystem






20. 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






21. 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






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






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






24. Include reproduction and protection from predators and destructive weather






25. 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






26. 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






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






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






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






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






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






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






33. The vegetation that becomes dominant and stable after years of evolutiionary development






34. Rivers - lakes - ponds - and marshes






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






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






37. Composed of populations that are able to exist under the new conditions






38. Animals that feed on secondary consumer






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






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






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






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






43. Include saprophytic organisms and organisms of decay






44. 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






45. The study of interactions between organisms and their environment






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






47. Organisms that manufacture their own food






48. Deer - fox - woodchuck - and squirrel






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






50. The oceans