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






2. Trees such as beech - maple - oaks - and willows shed their leaves during cold winters months






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






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






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






6. 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






7. Crawling and sessile organsms






8. 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






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






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






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






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






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






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






15. 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






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






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






18. Nitrates are absorbed by plants are used to syntheisze nucleic acids and plant proteins






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






20. 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






21. 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






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






23. 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






24. Animals that consume green plants (herbivores)






25. Freshwater Biomes vs. Saltwater 2: In rivers and streams - strong swift currents exist - and thus fish that have developed strong muscles and plants with _____________ have survived






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






27. Conserve water actively






28. Recycle water - oxygen - and phosphorus






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






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






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






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






33. Animals that eat both plants and animals






34. 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






35. Rivers - lakes - ponds - and marshes






36. Animals that consume only plants or plant foods






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






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






39. First to resettle a virgin area






40. Region on the continental shelf that contains ocean area with depths up to 600 feet and extends several hundred miles from the shores






41. Links between oceans and land






42. 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






43. Include reproduction and protection from predators and destructive weather






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






45. Algae - sponges - clams - snails - sea urchins - starfish - and crabs






46. Adaptations for maintaining their internal osmolarity and conserving water






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






48. 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






49. 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






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