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






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






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






4. Affect the type of vegetation that can be supported






5. Cannot synthesize their ow food and must depend upon autotrophs or others in the ecosystem to obtain their food






6. Links between oceans and land






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






8. 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






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






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






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






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






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






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






15. 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






16. Developed long legs and many are hoofed






17. Organisms that manufacture their own food






18. Symbiotic relationship from which both organisms derive some benefit






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






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






21. Rivers - lakes - ponds - and marshes






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






23. Conserve water actively






24. Include reproduction and protection from predators and destructive weather






25. The ultimate source of energy for all organisms






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






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






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






29. Determines water holding capacity






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






31. 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






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






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






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






35. Recycle water - oxygen - and phosphorus






36. The oceans






37. 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






38. Animals that only eat other animals -possess pointed teeth and fang-like canine teeth for tearing flesh -have shorter digestive tracts because the easier digestibility of animal food






39. Receive less than ten inches of rain each year; the rain is concentrated within a few heavy cloudbursts -ex: Sahara in Africa and Gobi in Asia






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






41. Vegetation such as vines and eppiphytes






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






43. 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






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






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






46. 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






47. Adaptations for maintaining their internal osmolarity and conserving water






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






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






50. Distinct community in a geographic region