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






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






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






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






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






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






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






8. Include reproduction and protection from predators and destructive weather






9. The study of interactions between organisms and their environment






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






11. 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






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






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






14. Include saprophytic organisms and organisms of decay






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






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






17. Determine by the amount of decaying plant and animal life in the soil






18. Animals that consume dead animals






19. Active swimmers such as fish - sharks - or whales that feed on plankton and smaller fish






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






21. 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






22. 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






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






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






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






26. 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






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






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






29. The oceans






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






31. Region exposed to low tides that undergoes variations in temperature and periods of dryness






32. Only animal life and other heterotrophic life exists






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






34. Distinct community in a geographic region






35. 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






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






37. Individuals belonging to the same species use the same resources and if a particular resource is limited - then these organisms must compete with one another






38. Regiong beneatht he photic zone that receives no light






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






40. 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






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






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






43. Animals that consume only plants or plant foods






44. 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






45. Animals that consume primary consumers (carnivores)






46. Rock and soil surface






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






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






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






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