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. 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






2. The ultimate source of energy for all organisms






3. Animals that consume primary consumers (carnivores)






4. Cannot synthesize their ow food and must depend upon autotrophs or others in the ecosystem to obtain their food






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






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






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






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






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






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






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






12. Needs constant energy source and cycling of materials between the living system






13. 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






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






15. 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






16. Region on the continental shelf that contains ocean area with depths up to 600 feet and extends several hundred miles from the shores






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






18. Animals that eat both plants and animals






19. Include reproduction and protection from predators and destructive weather






20. 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






21. When a parasite benefits at the expense of the host






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






23. Contains plankton - passively drifting masses of microscopic photosynthetic and heterotrophic organisms - and nekton - and algae






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






25. Lichens and moss






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






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






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






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






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






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






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






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






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






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






36. Developed long legs and many are hoofed






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






38. The chief disruptive force






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. 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






41. Affect the type of vegetation that can be supported






42. Vegetation such as vines and eppiphytes






43. 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






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






45. Conserve water actively






46. Distinct community in a geographic region






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






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






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






50. Symbiotic relationship from which both organisms derive some benefit