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






2. The study of interactions between organisms and their environment






3. The oceans






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






5. Only animal life and other heterotrophic life exists






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






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






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






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






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






11. Freshwater Biomes vs. Saltwater 1: Freshwater is _______________ which results in the passage of water into the cell. Freshwater organisms have homeostatic mechanisms to maintain water balance by the regular removal of the excess water. these include






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






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






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






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






16. When a parasite benefits at the expense of the host






17. 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






18. Used to include only the population and not their physical environment






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






20. Organisms that manufacture their own food






21. Conserve water actively






22. Regiong beneatht he photic zone that receives no light






23. Freshwater Biomes vs. Saltwater 3: Freshwater biomes - except very large lakes - are affected by variations in _________. temperature of freshwater bodies varies considerably; they may freeze or dry up - and mud from their floors may be stirred up by






24. 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






25. Animals that consume dead animals






26. Crawling and sessile organsms






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






28. Recycle water - oxygen - and phosphorus






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






30. Links between oceans and land






31. 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






32. 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






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






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






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






36. Symbiotic relationship from which both organisms derive some benefit






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






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






39. Deer - fox - woodchuck - and squirrel






40. The orderly process by which one biotic community replaces or succeeds another until a climax community is established






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






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






43. 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






44. 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






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






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






47. 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






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






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






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