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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. Developed long legs and many are hoofed






2. Live together in an intimate - often permanent association - which may or may not be beneficial to both participants






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






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






5. Determines water holding capacity






6. 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






7. Organisms that manufacture their own food






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






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






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






11. The oceans






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






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






15. Animals that consume dead animals






16. 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






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






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






19. 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






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






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






22. Regiong beneatht he photic zone that receives no light






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






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






25. The chief disruptive force






26. Conserve water actively






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






28. Adaptations for maintaining their internal osmolarity and conserving water






29. Crawling and sessile organsms






30. 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






31. Consists of populations of different plants and animal species interacting with each other in a given environment






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






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






34. Affect the type of vegetation that can be supported






35. 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






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






37. 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






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






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






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






41. 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






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. 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






44. 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






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






46. Recycle water - oxygen - and phosphorus






47. Animals that eat both plants and animals






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






49. Only animal life and other heterotrophic life exists






50. Animals that consume only plants or plant foods







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