Test your basic knowledge |

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. Deer - fox - woodchuck - and squirrel






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






3. Animals that consume dead animals






4. Only animal life and other heterotrophic life exists






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






6. Organisms that manufacture their own food






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






8. Recycle water - oxygen - and phosphorus






9. Determines water holding capacity






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






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






12. 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






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






14. Animals that consume green plants (herbivores)






15. 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






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






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






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. Vegetation has evolved adaptations for water conservation such as needle shaped leaves






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






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






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






23. Animals that consume only plants or plant foods






24. 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






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






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






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






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






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






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






31. 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






32. One that exerts control over the other species that are present






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






34. The chief disruptive force






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






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






37. Links between oceans and land






38. Include reproduction and protection from predators and destructive weather






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






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






41. 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






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






43. Nutrients - water - and sunlight limitations aid in maintaining populations at relatively constant levels






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






45. Conserve water actively






46. Regiong beneatht he photic zone that receives no light






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






48. 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






49. Lichens and moss






50. Include saprophytic organisms and organisms of decay