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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. 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






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






3. Ammonia (NH3) is broken down to release free nitrogen - which returns to the beginning of the denitrifying






4. 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






5. 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






6. 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






7. The chief disruptive force






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






9. Animals that feed on secondary consumer






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






11. Links between oceans and land






12. Rivers - lakes - ponds - and marshes






13. 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






14. Include reproduction and protection from predators and destructive weather






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






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






17. 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






18. Forest floors contain moss and lichens






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






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






21. Distinct community in a geographic region






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






23. 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






24. Chief animal inhabitant is the moose; however - the black bear - wolf - and some birds






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






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






27. 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






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






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






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






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






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






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






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






35. 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






36. Animals that consume dead animals






37. Community in an ecological succession is identified by a dominant species






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






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






40. Developed long legs and many are hoofed






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






42. The orderly process by which one biotic community replaces or succeeds another until a climax community is established






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






44. 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






45. 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






46. Deer - fox - woodchuck - and squirrel






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






48. Rock and soil surface






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






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