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






2. Developed long legs and many are hoofed






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






4. Regiong beneatht he photic zone that receives no light






5. Deer - fox - woodchuck - and squirrel






6. Adaptations for maintaining their internal osmolarity and conserving water






7. 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






8. Animals that consume primary consumers (carnivores)






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






10. Region typical of the open seas and can be divided into photic and aphotic zones






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






12. Include reproduction and protection from predators and destructive weather






13. Distinct community in a geographic region






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






15. Organisms that manufacture their own food






16. Algae - sponges - clams - snails - sea urchins - starfish - and crabs






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






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






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






20. Crawling and sessile organsms






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






22. Freshwater Biomes vs. Saltwater 1: Freshwater is _______________ which results in the passage of water into the cell. Freshwater organisms have homeostatic mechanisms to maintain water balance by the regular removal of the excess water. these include






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






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






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






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






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






28. Include saprophytic organisms and organisms of decay






29. Animals that consume green plants (herbivores)






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






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






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






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






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






35. Links between oceans and land






36. Rock and soil surface






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






38. Recycle water - oxygen - and phosphorus






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






40. Lichens and moss






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






42. 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






43. 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






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






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






46. Polar bears - musk oxen - and arctic hens






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






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






49. The vegetation that becomes dominant and stable after years of evolutiionary development






50. Vegetation such as vines and eppiphytes







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