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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. Only animal life and other heterotrophic life exists






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






3. Distinct community in a geographic region






4. Adaptations for maintaining their internal osmolarity and conserving water






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






6. 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






7. 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






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






9. Recycle water - oxygen - and phosphorus






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






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






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






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






14. 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






15. Forest floors contain moss and lichens






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






17. 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






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






19. Animals that eat both plants and animals






20. Animals eat the plants and synthesize specific animal proteins form the plant proteins. both plants and animals give off wastes and eventually die






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






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






23. 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






24. 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






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






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






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






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






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






30. Conserve water actively






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






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






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






34. Regiong beneatht he photic zone that receives no light






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






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






37. Animals that feed on secondary consumer






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






39. Trees such as beech - maple - oaks - and willows shed their leaves during cold winters months






40. Animals that consume dead animals






41. 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






42. Rock and soil surface






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






44. The study of interactions between organisms and their environment






45. 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






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






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






48. Symbiotic relationship from which both organisms derive some benefit






49. 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






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