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






2. 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






3. Deer - fox - woodchuck - and squirrel






4. Lichens and moss






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






6. Crawling and sessile organsms






7. Animals that consume dead animals






8. Affect the type of vegetation that can be supported






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






11. 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






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






13. When one organism is benefited by the association and the other is not affected






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






15. Recycle water - oxygen - and phosphorus






16. First to resettle a virgin area






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






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






19. Ammonia (NH3) is broken down to release free nitrogen - which returns to the beginning of the denitrifying






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






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






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






23. 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






24. Animals that feed on secondary consumer






25. Vegetation has evolved adaptations for water conservation such as needle shaped leaves






26. Animals that consume only plants or plant foods






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






28. 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






29. Made into nitrites by chemosynthetic bacteria and then to usable nitrates by nitrifying bacteria






30. Animals that eat both plants and animals






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






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






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






34. Adaptations for maintaining their internal osmolarity and conserving water






35. Forest floors contain moss and lichens






36. Developed long legs and many are hoofed






37. Vegetation such as vines and eppiphytes






38. 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






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






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






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






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






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






44. 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






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






46. The ultimate source of energy for all organisms






47. 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






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






49. Only animal life and other heterotrophic life exists






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







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