Test your basic knowledge |

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. Animals that feed on secondary consumer






2. Developed long legs and many are hoofed






3. Animals that consume dead animals






4. Organisms that manufacture their own food






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






6. Every energy transfer involves a loss of energy and each level of the food chain uses some of the energy it obtains from the food for its own metabolism and loses some additional energy in the form of heat






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






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






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






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






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






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






13. Crawling and sessile organsms






14. Recycle water - oxygen - and phosphorus






15. Conserve water actively






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






17. First to resettle a virgin area






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






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






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






21. 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






22. 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






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






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






25. 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






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






27. Group of organisms of the same species living together in a given location






28. Nutrients - water - and sunlight limitations aid in maintaining populations at relatively constant levels






29. Rock and soil surface






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






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






32. Only animal life and other heterotrophic life exists






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






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






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






36. 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






37. Affect the type of vegetation that can be supported






38. The study of interactions between organisms and their environment






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






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






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






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






43. Forest floors contain moss and lichens






44. 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






45. Animals that consume only plants or plant foods






46. Free-living organisms that feed on other living organisms






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






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






49. 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






50. Polar bears - musk oxen - and arctic hens