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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. 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. 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






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






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






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






6. 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






7. Organisms that manufacture their own food






8. Algae - sponges - clams - snails - sea urchins - starfish - and crabs






9. Freshwater Biomes vs. Saltwater 1: Freshwater is _______________ which results in the passage of water into the cell. Freshwater organisms have homeostatic mechanisms to maintain water balance by the regular removal of the excess water. these include






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






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






12. Animals that consume only plants or plant foods






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






14. Elemental nitrogen is chemically inert and cannot be used by most organisms. Lightning and nitrogen-fixing bacteria in the roots of legumes change the nitrogen into the usable - soluble nitrates






15. The oceans






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






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. Determine by the amount of decaying plant and animal life in the soil






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






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






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






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






23. 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






24. Animals that consume dead animals






25. Links between oceans and land






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






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






28. Sunlit layer of the open sea extending to a depth of 250-600ft






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






30. Lichens and moss






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






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






33. Polar bears - musk oxen - and arctic hens






34. Rivers - lakes - ponds - and marshes






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






36. Have cold winters - warm summers - and moderate rainfall -found in the Northeast and Central-Eastern United States and Central Europe






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






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






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






40. Adaptations for maintaining their internal osmolarity and conserving water






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






42. Distinct community in a geographic region






43. One species may be competitively superior to the other and drive the second to extinction






44. Animals that consume green plants (herbivores)






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






46. Symbiotic relationship from which both organisms derive some benefit






47. 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






48. Forest floors contain moss and lichens






49. 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






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