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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. 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






2. Animals that consume green plants (herbivores)






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






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






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






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






7. Developed long legs and many are hoofed






8. 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






9. Distinct community in a geographic region






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






11. Recycle water - oxygen - and phosphorus






12. Links between oceans and land






13. Lichens and moss






14. 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






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






16. Forest floors contain moss and lichens






17. Rivers - lakes - ponds - and marshes






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






19. The chief disruptive force






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






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






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






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






24. Determines the nature of plant and animal life in the soil






25. 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






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






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






29. Animals that consume primary consumers (carnivores)






30. Regiong beneatht he photic zone that receives no light






31. Individual unit of an ecological system - but the organism itself is composed of smaller units -organs >tissues >cells >molecules >atoms > subatomic particles






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






33. 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






34. Animals that feed on secondary consumer






35. Must be maintained at an optimal level -organisms have adaptations necessary for protection against extremes






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






37. 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






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






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






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






41. 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






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






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






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






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






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






47. Animals that eat both plants and animals






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






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






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