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






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






3. Lichens and moss






4. 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






5. Animals that feed on secondary consumer






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






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






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






9. An essential component of amino acids and nucleic acids - which are the building blocks of all living things






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






11. The study of interactions between organisms and their environment






12. 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






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






14. Animals that consume dead animals






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






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






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






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






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






20. 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






21. Active swimmers such as fish - sharks - or whales that feed on plankton and smaller fish






22. 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






23. 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






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






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






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






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






28. 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






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






30. Recycle water - oxygen - and phosphorus






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






32. 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






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






34. Receive less rainfall than the temperate forests - have long - cold winters - and are inhabited by single coniferous tree-the spruce -extreme northern parts of Canada and Russia






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






36. 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






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






38. Elemental nitrogen is chemically inert and cannot be used by most organisms. Lightning and nitrogen-fixing bacteria in the roots of legumes change the nitrogen into the usable - soluble nitrates






39. 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






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






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






42. Animals that consume green plants (herbivores)






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






44. Affect the type of vegetation that can be supported






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






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






47. Only animal life and other heterotrophic life exists






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






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






50. Include saprophytic organisms and organisms of decay