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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. Animals that consume dead animals






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






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






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






5. Include reproduction and protection from predators and destructive weather






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






7. Developed long legs and many are hoofed






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






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






10. (living) includes all living things that directly or indirectly influence the life of the organism including the relationships that exist between organisms






11. 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






12. 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






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






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






15. Conserve water actively






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






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






18. Regiong beneatht he photic zone that receives no light






19. Animals that consume only plants or plant foods






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






21. 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






22. The chief disruptive force






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






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






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






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






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






28. 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






29. Only animal life and other heterotrophic life exists






30. 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






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






32. Polar bears - musk oxen - and arctic hens






33. First to resettle a virgin area






34. Recycle water - oxygen - and phosphorus






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






36. Forest floors contain moss and lichens






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






38. Links between oceans and land






39. Deer - fox - woodchuck - and squirrel






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






41. 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






42. Animals that feed on secondary consumer






43. Live together in an intimate - often permanent association - which may or may not be beneficial to both participants






44. 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






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






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






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






48. The study of interactions between organisms and their environment






49. Symbiotic relationship from which both organisms derive some benefit






50. 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







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