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






2. Animals that consume primary consumers (carnivores)






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






4. 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






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






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






7. One or both organisms can't survive without the other






8. 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






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






10. Only animal life and other heterotrophic life exists






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






12. 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






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






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






15. 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






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






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






18. 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






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






20. The chief disruptive force






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






22. Links between oceans and land






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






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






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






26. 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






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






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






29. Adaptations for maintaining their internal osmolarity and conserving water






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






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






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






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






34. 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






35. Developed long legs and many are hoofed






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






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






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






39. 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






40. 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






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






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






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






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






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






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






47. Organisms that manufacture their own food






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






49. An essential component of amino acids and nucleic acids - which are the building blocks of all living things






50. Lichens and moss