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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 dead animals






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






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






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






5. First to resettle a virgin area






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






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






8. Animals that consume only plants or plant foods






9. 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






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






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






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






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






14. 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






15. Animals that eat both plants and animals






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






17. Nutrients - water - and sunlight limitations aid in maintaining populations at relatively constant levels






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






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






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






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






22. Animals that feed on secondary consumer






23. Animals that consume green plants (herbivores)






24. 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






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






26. 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






27. Organisms that manufacture their own food






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






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






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






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






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






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






34. Adaptations for maintaining their internal osmolarity and conserving water






35. Affect the type of vegetation that can be supported






36. Developed long legs and many are hoofed






37. Distinct community in a geographic region






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






39. 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






40. Links between oceans and land






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






42. 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






43. Rivers - lakes - ponds - and marshes






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






45. The study of interactions between organisms and their environment






46. 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






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






48. Determines water holding capacity






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






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