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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. Animals that consume primary consumers (carnivores)






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






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






4. Include saprophytic organisms and organisms of decay






5. The ultimate source of energy for all organisms






6. Defines the functional role of an organism in its ecosystem -described what the organism eats - where and how it obtains its food - what climatic factors it can tolerate and which are optimal - the nature of its parasites and predators - where and ho






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






8. When a parasite benefits at the expense of the host






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






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






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






12. Consumer organisms that are higher in hte food chain are usually larger and heavier than those further down






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






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






15. 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






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






17. 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






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






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. Freshwater Biomes vs. Saltwater 3: Freshwater biomes - except very large lakes - are affected by variations in _________. temperature of freshwater bodies varies considerably; they may freeze or dry up - and mud from their floors may be stirred up by






21. 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






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






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






24. Links between oceans and land






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






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






27. Recycle water - oxygen - and phosphorus






28. Lichens and moss






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






30. 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






31. 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






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






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






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






35. Animals that consume only plants or plant foods






36. Only animal life and other heterotrophic life exists






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






38. Include reproduction and protection from predators and destructive weather






39. Without a constant input of energy from the sun - an ecosystem would soon run down - as food is transferred from one level of the food chain to the next - a transfer of energy occurs






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






41. Regiong beneatht he photic zone that receives no light






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






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






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






45. Affect the type of vegetation that can be supported






46. Animals that feed on secondary consumer






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






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






49. Conserve water actively






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