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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. Recycle water - oxygen - and phosphorus






2. 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






3. The chief disruptive force






4. One or both organisms can't survive without the other






5. First to resettle a virgin area






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






7. (living) includes all living things that directly or indirectly influence the life of the organism including the relationships that exist between organisms






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






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






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






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






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






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






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






15. Rock and soil surface






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






17. Vegetation such as vines and eppiphytes






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






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






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






21. Animals that consume only plants or plant foods






22. 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






23. Distinct community in a geographic region






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






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






26. Determined by the same decisive factors-temperatures and rainfall






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






28. 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






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






30. 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






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






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






33. 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






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






35. 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






36. 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






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






38. Include reproduction and protection from predators and destructive weather






39. Rivers - lakes - ponds - and marshes






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






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






42. 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






43. The study of interactions between organisms and their environment






44. 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






45. 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






46. 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






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






48. Regiong beneatht he photic zone that receives no light






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






50. Developed long legs and many are hoofed