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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. Links between oceans and land






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






3. Free-living organisms that feed on other living organisms






4. Region exposed to low tides that undergoes variations in temperature and periods of dryness






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






6. Adaptations for maintaining their internal osmolarity and conserving water






7. 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






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






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






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






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






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






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






14. Regiong beneatht he photic zone that receives no light






15. Plants growing on other plants - trees grow closely together; sunlight hardly reaches the forest floor






16. Rivers - lakes - ponds - and marshes






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






18. Without a constant input of energy from the sun - an ecosystem would soon run down - as food is transferred from one level of the food chain to the next - a transfer of energy occurs






19. 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






20. Animals that consume dead animals






21. First to resettle a virgin area






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






23. Forest floors contain moss and lichens






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






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






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






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






28. The study of interactions between organisms and their environment






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






30. Determines water holding capacity






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






32. Conserve water actively






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






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






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






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






37. Determine by the amount of decaying plant and animal life in the soil






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






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






40. 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






41. Animals that feed on secondary consumer






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






43. 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






44. 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






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






46. Only animal life and other heterotrophic life exists






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






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






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






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