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






2. Adaptations for maintaining their internal osmolarity and conserving water






3. 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






4. Animals that eat both plants and animals






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






6. The chief disruptive force






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






8. Includes climate - temperature - availability of light and water - and the local topology






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






10. Rivers - lakes - ponds - and marshes






11. Forest floors contain moss and lichens






12. Plants growing on other plants - trees grow closely together; sunlight hardly reaches the forest floor






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






14. Regiong beneatht he photic zone that receives no light






15. 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






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






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






18. Evolved physical mechanisms that allow them to make Use of the heat produced as a consequence of respiratiion






19. Animals that consume only plants or plant foods






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






21. 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






22. Deer - fox - woodchuck - and squirrel






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






24. The stable - living part of the ecosystem in whicih populations exist in balance with each other and with the environment






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






26. Links between oceans and land






27. Vegetation such as vines and eppiphytes






28. 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






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






30. The oceans






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






32. Distinct community in a geographic region






33. 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






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






35. Polar bears - musk oxen - and arctic hens






36. 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






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






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






39. The orderly process by which one biotic community replaces or succeeds another until a climax community is established






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






41. Crawling and sessile organsms






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






43. Animals that consume primary consumers (carnivores)






44. Animals that feed on secondary consumer






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






46. Region typical of the open seas and can be divided into photic and aphotic zones






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






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






49. Because organisms at the upper levels of the food chain derive their food energy from organisms at lower levels - and because energy is lost from one level to the next - each level can support a successively smaller biomass






50. Affect the type of vegetation that can be supported