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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. Free-living organisms that feed on other living organisms






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






3. 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






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






5. Conserve water actively






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






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






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






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






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






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






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






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






14. Recycle water - oxygen - and phosphorus






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






16. 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






17. Lichens and moss






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






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






20. Animals that consume primary consumers (carnivores)






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






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






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






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






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






26. The oceans






27. Polar bears - musk oxen - and arctic hens






28. Deer - fox - woodchuck - and squirrel






29. 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






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






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






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






33. 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






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






35. More than 70% of earth -plants have little controlling influence in communities -most stable ecosystems; the conditions affecting temperature - amount of available oxygen and cabon dioxide - and amount of suspended or dissolve materials are very stab






36. Determines water holding capacity






37. Vegetation such as vines and eppiphytes






38. Adaptations for maintaining their internal osmolarity and conserving water






39. Freshwater Biomes vs. Saltwater 3: Freshwater biomes - except very large lakes - are affected by variations in _________. temperature of freshwater bodies varies considerably; they may freeze or dry up - and mud from their floors may be stirred up by






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






41. 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






42. Regiong beneatht he photic zone that receives no light






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






44. Forest floors contain moss and lichens






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






46. The ultimate source of energy for all organisms






47. Freshwater Biomes vs. Saltwater 2: In rivers and streams - strong swift currents exist - and thus fish that have developed strong muscles and plants with _____________ have survived






48. Made into nitrites by chemosynthetic bacteria and then to usable nitrates by nitrifying bacteria






49. Crawling and sessile organsms






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