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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. Nekton and benthos - scavengers - and predators (fiercely competitive)






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






3. The metabolically produced CO2 is released to the air. The rest of the orgnaic carbon remains locked whthin an organism until its death (except for wastes given off) - at which time decay processes by bacteria return the CO2 to the air






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






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






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






7. Include reproduction and protection from predators and destructive weather






8. Animals that consume only plants or plant foods






9. 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






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






11. Lichens and moss






12. 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






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






14. 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






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






16. Vegetation such as vines and eppiphytes






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






18. Characterized by low rainfall - although considerably more than the desert biomes receive -provide no shelter for herbivorous mammals from carnivorous predators -ex: East of the Rockies - steppes of the Ukraine - and the pampas of Argentina






19. 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






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






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






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






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






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






25. Live together in an intimate - often permanent association - which may or may not be beneficial to both participants






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






27. 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






28. 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






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






30. 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






31. Distinct community in a geographic region






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






33. Jungles characterized by high temperatures and torrential rains -found in Central Africa - Central America - the Amazon basic - and Southeast Asia






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






35. 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






36. The study of interactions between organisms and their environment






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






38. Organisms that manufacture their own food






39. 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






40. Only animal life and other heterotrophic life exists






41. The oceans






42. First to resettle a virgin area






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






44. Polar bears - musk oxen - and arctic hens






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






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






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






48. Crawling and sessile organsms






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






50. Links between oceans and land