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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. The study of interactions between organisms and their environment






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






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






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






5. 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






6. Vegetation such as vines and eppiphytes






7. 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






8. Affect the type of vegetation that can be supported






9. Regiong beneatht he photic zone that receives no light






10. 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






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






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






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






14. Forest floors contain moss and lichens






15. Animals that consume primary consumers (carnivores)






16. Polar bears - musk oxen - and arctic hens






17. Oceans connect to form one continuous body of water - which controls the earth's temperature by absorbing solar heat






18. Rivers - lakes - ponds - and marshes






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






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






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






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






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






24. 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






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






26. 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






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






28. First to resettle a virgin area






29. 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






30. Links between oceans and land






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






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






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






34. Adaptations for maintaining their internal osmolarity and conserving water






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






36. 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






37. Animals that consume dead animals






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






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






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






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






42. 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






43. Treeless - frozen plain found between the taiga lands and the northern ice sheets - very short summer and thus a very short growing season during which time the ground becomes wet and marshy






44. In the ocean - the top layer thorugh which light can penetrate - is where all aquatic photosynthetic activity takes place






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






46. Animals that feed on secondary consumer






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






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






49. Symbiotic relationship from which both organisms derive some benefit






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







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