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






2. Affect the type of vegetation that can be supported






3. Animals that eat both plants and animals






4. 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






5. Include reproduction and protection from predators and destructive weather






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






7. 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






8. 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






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






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






11. The oceans






12. The ultimate source of energy for all organisms






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






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






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






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






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






18. Conserve water actively






19. Determines water holding capacity






20. Vegetation such as vines and eppiphytes






21. 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






22. The study of interactions between organisms and their environment






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






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






25. Recycle water - oxygen - and phosphorus






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






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






28. The chief disruptive force






29. 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






30. Developed long legs and many are hoofed






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






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






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






34. 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






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






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






37. 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






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






39. 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






40. 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






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






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






43. 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






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






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






46. Animals that consume primary consumers (carnivores)






47. Animals that consume dead animals






48. 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






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






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