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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 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






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






3. Animals that feed on secondary consumer






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






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






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






7. Elemental nitrogen is chemically inert and cannot be used by most organisms. Lightning and nitrogen-fixing bacteria in the roots of legumes change the nitrogen into the usable - soluble nitrates






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






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






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






12. Only animal life and other heterotrophic life exists






13. 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






14. The study of interactions between organisms and their environment






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






16. 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






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






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






19. 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






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






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






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






23. 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






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






25. Animals that consume primary consumers (carnivores)






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






27. Vegetation such as vines and eppiphytes






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






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






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






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






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






33. The chief disruptive force






34. The oceans






35. First to resettle a virgin area






36. Animals that consume green plants (herbivores)






37. Conserve water actively






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






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






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 consume only plants or plant foods






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






43. Links between oceans and land






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






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






46. Include reproduction and protection from predators and destructive weather






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






48. 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






49. Recycle water - oxygen - and phosphorus






50. Rivers - lakes - ponds - and marshes







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