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






2. Conserve water actively






3. The ultimate source of energy for all organisms






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






5. Rock and soil surface






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






7. Symbiotic relationship from which both organisms derive some benefit






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






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






10. 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






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






12. Include reproduction and protection from predators and destructive weather






13. Animals that feed on secondary consumer






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






15. 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






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






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






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






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. Determines water holding capacity






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






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






23. Distinct community in a geographic region






24. Animals that consume green plants (herbivores)






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






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






27. Have adaptations enabling them to survive in very cod water - with high pressures - and in complete darkness






28. Polar bears - musk oxen - and arctic hens






29. Links between oceans and land






30. Animals that eat both plants and animals






31. More than 70% of earth -plants have little controlling influence in communities -most stable ecosystems; the conditions affecting temperature - amount of available oxygen and cabon dioxide - and amount of suspended or dissolve materials are very stab






32. 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






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






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






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






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






37. 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






38. Recycle water - oxygen - and phosphorus






39. Animals that consume primary consumers (carnivores)






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






41. Crawling and sessile organsms






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






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






44. Animals that consume only plants or plant foods






45. Animals that consume dead animals






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






47. 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






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






49. Vegetation such as vines and eppiphytes






50. 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