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






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






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






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






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






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






7. Symbiotic relationship from which both organisms derive some benefit






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






9. Deer - fox - woodchuck - and squirrel






10. Recycle water - oxygen - and phosphorus






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






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






13. 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






14. Animals that consume only plants or plant foods






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






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






17. 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






18. 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






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






20. 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






21. First to resettle a virgin area






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






23. 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






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






25. 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






26. Organisms that manufacture their own food






27. Regiong beneatht he photic zone that receives no light






28. Animals that consume dead animals






29. Adaptations for maintaining their internal osmolarity and conserving water






30. Because organisms at the upper levels of the food chain derive their food energy from organisms at lower levels - and because energy is lost from one level to the next - each level can support a successively smaller biomass






31. 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






32. Affect the type of vegetation that can be supported






33. 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






34. Links between oceans and land






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






36. Forest floors contain moss and lichens






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






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






39. Only animal life and other heterotrophic life exists






40. Each member of a food chain uses some of the energy it obtains from its food for its own metabolism and loses some additional energy in the form of heat






41. Developed long legs and many are hoofed






42. Without a constant input of energy from the sun - an ecosystem would soon run down - as food is transferred from one level of the food chain to the next - a transfer of energy occurs






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






44. Free-living organisms that feed on other living organisms






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






46. 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






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






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






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






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