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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. Energy is transferred from the original sources in green plants through a series o organisms with repeated stages of consumption and finally decomposition






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






3. Adaptations for maintaining their internal osmolarity and conserving water






4. Have adaptations enabling them to survive in very cod water - with high pressures - and in complete darkness






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






6. Lichens and moss






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






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






9. Rock and soil surface






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






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






12. 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






13. Organisms that manufacture their own food






14. Include saprophytic organisms and organisms of decay






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






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






17. Nitrates are absorbed by plants are used to syntheisze nucleic acids and plant proteins






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






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






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






21. Determines water holding capacity






22. Animals that consume primary consumers (carnivores)






23. 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






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






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






26. 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






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






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






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






30. Rivers - lakes - ponds - and marshes






31. 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






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






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






34. 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






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






36. Determine by the amount of decaying plant and animal life in the soil






37. Animals that eat both plants and animals






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. 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






40. Vegetation such as vines and eppiphytes






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






42. Animals that consume green plants (herbivores)






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






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






45. Animals that consume dead animals






46. 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






47. Recycle water - oxygen - and phosphorus






48. Individuals belonging to the same species use the same resources and if a particular resource is limited - then these organisms must compete with one another






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






50. 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







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