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






2. 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






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






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






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






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






7. 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






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






9. Algae - crabs - crustacea - and many different species of fish






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






11. 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






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






13. 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






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






15. Animals that feed on secondary consumer






16. Animals that consume only plants or plant foods






17. First to resettle a virgin area






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






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






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






21. 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






22. 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






23. 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






24. 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






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






26. Determine by the amount of decaying 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. Region typical of the open seas and can be divided into photic and aphotic zones






29. Animals that consume green plants (herbivores)






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






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






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






33. Deer - fox - woodchuck - and squirrel






34. Recycle water - oxygen - and phosphorus






35. Individual unit of an ecological system - but the organism itself is composed of smaller units -organs >tissues >cells >molecules >atoms > subatomic particles






36. Vegetation such as vines and eppiphytes






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






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






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






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






41. 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






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






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






44. Rivers - lakes - ponds - and marshes






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






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






47. Needs constant energy source and cycling of materials between the living system






48. Distinct community in a geographic region






49. 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






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







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