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






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






3. The oceans






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






5. First to resettle a virgin area






6. Recycle water - oxygen - and phosphorus






7. Rock and soil surface






8. Individual unit of an ecological system - but the organism itself is composed of smaller units -organs >tissues >cells >molecules >atoms > subatomic particles






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






10. Evolve toward a balance in which the predator is a regulatory influence on th prey but not a threat to its survival






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






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






13. 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






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






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






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






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






18. Developed long legs and many are hoofed






19. Distinct community in a geographic region






20. 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






21. Rivers - lakes - ponds - and marshes






22. Links between oceans and land






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






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






25. Regiong beneatht he photic zone that receives no light






26. 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






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






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






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






30. Symbiotic relationship from which both organisms derive some benefit






31. Region on the continental shelf that contains ocean area with depths up to 600 feet and extends several hundred miles from the shores






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. Lichens and moss






34. 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






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






36. Animals that consume green plants (herbivores)






37. 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






38. The ultimate source of energy for all organisms






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






40. Adaptations for maintaining their internal osmolarity and conserving water






41. Animals that consume primary consumers (carnivores)






42. Must be maintained at an optimal level -organisms have adaptations necessary for protection against extremes






43. 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






44. 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






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






46. One that exerts control over the other species that are present






47. 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






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






49. Animals that consume dead animals






50. 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