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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. Symbiotic relationship from which both organisms derive some benefit






2. Rivers - lakes - ponds - and marshes






3. First to resettle a virgin area






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






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






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






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






8. The ultimate source of energy for all organisms






9. Deer - fox - woodchuck - and squirrel






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






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






12. Animals eat plants and use the digested nutrients to form carbohydrates - fats - and proteins characteristic of the species. a part of these organic compounds is used as fuel in respiration in plants and animals






13. 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






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






15. The oceans






16. Animals that consume primary consumers (carnivores)






17. Adaptations for maintaining their internal osmolarity and conserving water






18. 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






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






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






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






22. Polar bears - musk oxen - and arctic hens






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






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






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






26. Animals that consume dead animals






27. 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






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






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






30. 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






31. Recycle water - oxygen - and phosphorus






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






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






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






35. Animals that consume only plants or plant foods






36. Organisms that manufacture their own food






37. Affect the type of vegetation that can be supported






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






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






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






41. 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






42. 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






43. Only animal life and other heterotrophic life exists






44. Include saprophytic organisms and organisms of decay






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






46. Animals that eat both plants and animals






47. Animals that consume green plants (herbivores)






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






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






50. Lichens and moss