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






3. Include saprophytic organisms and organisms of decay






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






5. Animals that eat both plants and animals






6. The ultimate source of energy for all organisms






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






8. Symbiotic relationship from which both organisms derive some benefit






9. Vegetation such as vines and eppiphytes






10. 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






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






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






13. 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






14. Only animal life and other heterotrophic life exists






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






16. Animals that consume green plants (herbivores)






17. Rivers - lakes - ponds - and marshes






18. Links between oceans and land






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






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






21. Nitrates are absorbed by plants are used to syntheisze nucleic acids and plant proteins






22. Conserve water actively






23. The chief disruptive force






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






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






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






27. 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






28. Animals that feed on secondary consumer






29. Animals that consume dead animals






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






31. 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






32. 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






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






34. Receive less than ten inches of rain each year; the rain is concentrated within a few heavy cloudbursts -ex: Sahara in Africa and Gobi in Asia






35. Two species may rapidly evolve in divergent directions under the strong selection pressure resulting from intense competition. thus - the two species would rapidly evolve greater differences in their niches






36. Characterized by low rainfall - although considerably more than the desert biomes receive -provide no shelter for herbivorous mammals from carnivorous predators -ex: East of the Rockies - steppes of the Ukraine - and the pampas of Argentina






37. 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






38. 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






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






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






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






42. 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






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






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






45. 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






46. 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






47. Animals eat the plants and synthesize specific animal proteins form the plant proteins. both plants and animals give off wastes and eventually die






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






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






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