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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. Recycle water - oxygen - and phosphorus






2. 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






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






4. Animals that consume dead animals






5. 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






6. 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






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






8. Include reproduction and protection from predators and destructive weather






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






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






11. 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






12. Polar bears - musk oxen - and arctic hens






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






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






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






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






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






18. Links between oceans and land






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






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






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






22. Animals that consume green plants (herbivores)






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






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






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






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






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






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






29. Any group of similar organisms that are capable of reproducing






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






31. Animals that eat both plants and animals






32. Regiong beneatht he photic zone that receives no light






33. Animals that consume primary consumers (carnivores)






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






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






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






37. Integrated system of species that are dependent upon one another for survival






38. 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






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






40. 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






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






42. 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






43. Animals that consume only plants or plant foods






44. 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






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






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






47. The oceans






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






49. 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






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







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