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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. Conserve water actively






2. Developed long legs and many are hoofed






3. Animals that eat both plants and animals






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






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






6. The stable - living part of the ecosystem in whicih populations exist in balance with each other and with the environment






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






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






9. Deer - fox - woodchuck - and squirrel






10. Symbiotic relationship from which both organisms derive some benefit






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






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






13. Forest floors contain moss and lichens






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






15. 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






16. Animals that consume green plants (herbivores)






17. Polar bears - musk oxen - and arctic hens






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






19. Autotrophic green plants and chemosynthetic bacteria that use the energy of the sun and simple raw materials to manufacture carbohydrates - proteins - and lipids






20. 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






21. Affect the type of vegetation that can be supported






22. Animals that consume dead animals






23. Animals that consume primary consumers (carnivores)






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






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






26. 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






27. The oceans






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






29. 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






30. Regiong beneatht he photic zone that receives no light






31. Animals that consume only plants or plant foods






32. 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






33. The chief disruptive force






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






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






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






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






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






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






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






41. Vegetation such as vines and eppiphytes






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






43. Distinct community in a geographic region






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






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






46. Determines water holding capacity






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






48. 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






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






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