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






2. 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






3. Animals that consume primary consumers (carnivores)






4. Determines water holding capacity






5. Symbiotic relationship from which both organisms derive some benefit






6. Lichens and moss






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






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






9. Only animal life and other heterotrophic life exists






10. Links between oceans and land






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






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






13. Recycle water - oxygen - and phosphorus






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






15. Deer - fox - woodchuck - and squirrel






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






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






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






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






20. 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






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






22. Rock and soil surface






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






24. Animals that only eat other animals -possess pointed teeth and fang-like canine teeth for tearing flesh -have shorter digestive tracts because the easier digestibility of animal food






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






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






27. Animals that consume green plants (herbivores)






28. 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






29. First to resettle a virgin area






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






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






32. Polar bears - musk oxen - and arctic hens






33. Algae - crabs - crustacea - and many different species of fish






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






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






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






38. 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






39. Crawling and sessile organsms






40. Animals that consume dead animals






41. 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






42. 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






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






44. 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






45. Include saprophytic organisms and organisms of decay






46. The oceans






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






48. Regiong beneatht he photic zone that receives no light






49. Rivers - lakes - ponds - and marshes






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