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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. Only animal life and other heterotrophic life exists






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






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






4. 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






5. Frozen area with no vegetation and terrestrial animals -animals that do inhabit polar regions generally live near the polar oceans






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






7. Affect the type of vegetation that can be supported






8. Distinct community in a geographic region






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






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






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






12. 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






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






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






15. Regiong beneatht he photic zone that receives no light






16. 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






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






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






19. Any group of similar organisms that are capable of reproducing






20. The ultimate source of energy for all organisms






21. Rock and soil surface






22. 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






23. The oceans






24. First to resettle a virgin area






25. Links between oceans and land






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






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






28. Gaseous CO2 enters the living world when plants use it to produce glucose via photosynthesis. The carbon atoms in CO2 are bonded to hydrogen and other carbon atoms. the plant uses the glucose to make starch - proteins - and fat






29. The chief disruptive force






30. Animals that consume primary consumers (carnivores)






31. 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






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






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






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






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






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






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






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






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






40. 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






41. Animals that consume dead animals






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






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






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






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






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






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






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






49. Conserve water actively






50. 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







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