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






2. Animals that consume only plants or plant foods






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






4. Rock and soil surface






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






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






7. 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






8. Animals that eat both plants and animals






9. 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






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






11. The ultimate source of energy for all organisms






12. Deer - fox - woodchuck - and squirrel






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






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






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






16. Animals eat plants and use the digested nutrients to form carbohydrates - fats - and proteins characteristic of the species. a part of these organic compounds is used as fuel in respiration in plants and animals






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






18. Animals that feed on secondary consumer






19. 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






20. Animals that consume dead animals






21. Adaptations for maintaining their internal osmolarity and conserving water






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






23. Include saprophytic organisms and organisms of decay






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






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






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






27. Animals that consume primary consumers (carnivores)






28. Determines water holding capacity






29. 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






30. 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






31. Regiong beneatht he photic zone that receives no light






32. 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






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






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






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






36. 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






37. The study of interactions between organisms and their environment






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






39. The nitrogen locked up in the wastes and dead tissues is released by the action of the bacteria of decay - which convert the proteins into ammonia






40. Symbiotic relationship from which both organisms derive some benefit






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






42. Vegetation such as vines and eppiphytes






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






44. 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






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






46. 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






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






48. Frozen area with no vegetation and terrestrial animals -animals that do inhabit polar regions generally live near the polar oceans






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






50. Links between oceans and land