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






2. Forest floors contain moss and lichens






3. Animals that feed on secondary consumer






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






5. Adaptations for maintaining their internal osmolarity and conserving water






6. 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






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






8. 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






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






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






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






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






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






14. Deer - fox - woodchuck - and squirrel






15. 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






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






17. Determines water holding capacity






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






19. 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






20. Crawling and sessile organsms






21. 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






22. 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






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






24. Regiong beneatht he photic zone that receives no light






25. Animals that consume primary consumers (carnivores)






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






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






28. Vegetation such as vines and eppiphytes






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






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






31. Two species may rapidly evolve in divergent directions under the strong selection pressure resulting from intense competition. thus - the two species would rapidly evolve greater differences in their niches






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






33. The study of interactions between organisms and their environment






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






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






36. Animals that eat both plants and animals






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






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






39. Organisms that manufacture their own food






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






41. Determined by the same decisive factors-temperatures and rainfall






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






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






44. 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






45. Animals that consume green plants (herbivores)






46. 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






47. 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






48. The chief disruptive force






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






50. Composed of populations that are able to exist under the new conditions