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






2. 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






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






4. 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






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






6. Animals that eat both plants and animals






7. Include reproduction and protection from predators and destructive weather






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






9. Chief animal inhabitant is the moose; however - the black bear - wolf - and some birds






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






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






12. 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






13. Recycle water - oxygen - and phosphorus






14. 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






15. Include saprophytic organisms and organisms of decay






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






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






18. Animals that consume primary consumers (carnivores)






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






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






21. 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






22. 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






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






24. Crawling and sessile organsms






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






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






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






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






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






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






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






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






33. Evolve toward a balance in which the predator is a regulatory influence on th prey but not a threat to its survival






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






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






36. Affect the type of vegetation that can be supported






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






38. Autotrophic green plants and chemosynthetic bacteria that use the energy of the sun and simple raw materials to manufacture carbohydrates - proteins - and lipids






39. 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






40. The study of interactions between organisms and their environment






41. Animals that feed on secondary consumer






42. First to resettle a virgin area






43. Forest floors contain moss and lichens






44. Adaptations for maintaining their internal osmolarity and conserving water






45. 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






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






47. 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






48. Determines water holding capacity






49. The ultimate source of energy for all organisms






50. The vegetation that becomes dominant and stable after years of evolutiionary development







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