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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. The oceans






2. Animals that consume dead animals






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






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






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






6. 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






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






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






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






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






11. 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






12. Adaptations for maintaining their internal osmolarity and conserving water






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






14. Links between oceans and land






15. The study of interactions between organisms and their environment






16. Symbiotic relationship from which both organisms derive some benefit






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






18. The stable - living part of the ecosystem in whicih populations exist in balance with each other and with the environment






19. Receive less rainfall than the temperate forests - have long - cold winters - and are inhabited by single coniferous tree-the spruce -extreme northern parts of Canada and Russia






20. Animals that consume green plants (herbivores)






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






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






23. Distinct community in a geographic region






24. 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






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






26. Developed long legs and many are hoofed






27. 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






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






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






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






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






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






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






34. 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






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






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






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






38. Animals that consume only plants or plant foods






39. Include saprophytic organisms and organisms of decay






40. Treeless - frozen plain found between the taiga lands and the northern ice sheets - very short summer and thus a very short growing season during which time the ground becomes wet and marshy






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






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






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






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






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






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






47. Include reproduction and protection from predators and destructive weather






48. Conserve water actively






49. Deer - fox - woodchuck - and squirrel






50. 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







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