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






3. Developed long legs and many are hoofed






4. Crawling and sessile organsms






5. 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






6. Organisms that manufacture their own food






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






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






9. Animals that eat both plants and animals






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






11. 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






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






13. Only animal life and other heterotrophic life exists






14. Polar bears - musk oxen - and arctic hens






15. The study of interactions between organisms and their environment






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






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






18. Freshwater Biomes vs. Saltwater 3: Freshwater biomes - except very large lakes - are affected by variations in _________. temperature of freshwater bodies varies considerably; they may freeze or dry up - and mud from their floors may be stirred up by






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






20. Regiong beneatht he photic zone that receives no light






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






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






23. Determines water holding capacity






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






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






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






27. The chief disruptive force






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






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






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






31. 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






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






33. Deer - fox - woodchuck - and squirrel






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






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






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






38. Affect the type of vegetation that can be supported






39. Animals that consume primary consumers (carnivores)






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






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






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






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






44. Symbiotic relationship from which both organisms derive some benefit






45. 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






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






47. 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






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






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






50. The metabolically produced CO2 is released to the air. The rest of the orgnaic carbon remains locked whthin an organism until its death (except for wastes given off) - at which time decay processes by bacteria return the CO2 to the air