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






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






3. Animals that eat both plants and animals






4. Deer - fox - woodchuck - and squirrel






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






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






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






8. 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






9. Recycle water - oxygen - and phosphorus






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






11. Regiong beneatht he photic zone that receives no light






12. Animals that consume primary consumers (carnivores)






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






14. 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






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






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






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






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






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






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






21. Affect the type of vegetation that can be supported






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






23. 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






24. When one organism is benefited by the association and the other is not affected






25. 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






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






27. 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






28. Rivers - lakes - ponds - and marshes






29. Vegetation such as vines and eppiphytes






30. 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






31. 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






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






33. 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






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






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






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






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






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






39. Have adaptations enabling them to survive in very cod water - with high pressures - and in complete darkness






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






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






42. Lichens and moss






43. 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






44. 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






45. Distinct community in a geographic region






46. Polar bears - musk oxen - and arctic hens






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






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






49. Forest floors contain moss and lichens






50. Include saprophytic organisms and organisms of decay