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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. Live in burrows had few birds and mammals are found except those which have developed adaptations for maintaining constant body temperatures






2. 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






3. Animals that consume dead animals






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






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






6. 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






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






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






9. 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






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






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






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






13. Include reproduction and protection from predators and destructive weather






14. Developed long legs and many are hoofed






15. 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






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






17. Determines water holding capacity






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






19. Deer - fox - woodchuck - and squirrel






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






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






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






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






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






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






26. Live together in an intimate - often permanent association - which may or may not be beneficial to both participants






27. Distinct community in a geographic region






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






29. Lichens and moss






30. The chief disruptive force






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






32. Only animal life and other heterotrophic life exists






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






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






36. 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






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






38. 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






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






40. The ultimate source of energy for all organisms






41. 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






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






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






44. 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






45. Algae - crabs - crustacea - and many different species of fish






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






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






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






49. The oceans






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