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. The chief disruptive force






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






3. 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






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






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






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. Animals that consume primary consumers (carnivores)






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






9. 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






10. The study of interactions between organisms and their environment






11. Adaptations for maintaining their internal osmolarity and conserving water






12. Polar bears - musk oxen - and arctic hens






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. Cold - dry - and inhabited by fir - pine - and spruce trees -much vegetation has evolved adaptations for water conservation such as needle-shaped leaves -Extreme Northern Part of the US and in Southern Canada






15. 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






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






17. Animals that feed on secondary consumer






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






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






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






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






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






23. Include reproduction and protection from predators and destructive weather






24. Symbiotic relationship from which both organisms derive some benefit






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






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






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






28. Distinct community in a geographic region






29. Links between oceans and land






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






31. Rock and soil surface






32. Animals that consume dead animals






33. Animals that consume only plants or plant foods






34. Developed long legs and many are hoofed






35. Animals that consume green plants (herbivores)






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






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






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






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






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






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






42. Defines the functional role of an organism in its ecosystem -described what the organism eats - where and how it obtains its food - what climatic factors it can tolerate and which are optimal - the nature of its parasites and predators - where and ho






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






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






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






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






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






48. Crawling and sessile organsms






49. 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






50. Affect the type of vegetation that can be supported