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






2. Sunlit layer of the open sea extending to a depth of 250-600ft






3. Have cold winters - warm summers - and moderate rainfall -found in the Northeast and Central-Eastern United States and Central Europe






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






5. 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






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






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






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






9. Animals that consume primary consumers (carnivores)






10. Forest floors contain moss and lichens






11. Animals that consume green plants (herbivores)






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






13. Include reproduction and protection from predators and destructive weather






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






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






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






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






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






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






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






21. 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






22. Animals that feed on secondary consumer






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






24. 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






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






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






27. 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






28. Elemental nitrogen is chemically inert and cannot be used by most organisms. Lightning and nitrogen-fixing bacteria in the roots of legumes change the nitrogen into the usable - soluble nitrates






29. 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






30. 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






31. First to resettle a virgin area






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






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






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






35. Links between oceans and land






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






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






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






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






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






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






42. 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






43. 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






44. Affect the type of vegetation that can be supported






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






46. 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






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






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






49. 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






50. Group of organisms of the same species living together in a given location