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






2. Gaseous CO2 enters the living world when plants use it to produce glucose via photosynthesis. The carbon atoms in CO2 are bonded to hydrogen and other carbon atoms. the plant uses the glucose to make starch - proteins - and fat






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






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






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






6. Determines water holding capacity






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






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






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






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






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






12. The study of interactions between organisms and their environment






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






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






15. 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






16. Include reproduction and protection from predators and destructive weather






17. 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






18. 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






19. Crawling and sessile organsms






20. Polar bears - musk oxen - and arctic hens






21. 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






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






23. 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






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






25. Links between oceans and land






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






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






28. Animals that feed on secondary consumer






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






30. Include saprophytic organisms and organisms of decay






31. Include those protists and fungi that decompose dead organic matter externally and absorb the nutrients - they consistitute a vital link in the cycling of material within the ecosystem






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






33. Animals that consume dead animals






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






35. Forest floors contain moss and lichens






36. Animals that consume primary consumers (carnivores)






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






38. Regiong beneatht he photic zone that receives no light






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






40. Deer - fox - woodchuck - and squirrel






41. Lichens and moss






42. First to resettle a virgin area






43. Recycle water - oxygen - and phosphorus






44. Vegetation such as vines and eppiphytes






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






46. Affect the type of vegetation that can be supported






47. Adaptations for maintaining their internal osmolarity and conserving water






48. 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






49. Animals that consume only plants or plant foods






50. The chief disruptive force