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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. Crawling and sessile organsms






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






3. 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






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






5. 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






6. Animals that consume green plants (herbivores)






7. 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






8. Symbiotic relationship from which both organisms derive some benefit






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






10. 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






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






12. Include reproduction and protection from predators and destructive weather






13. Includes the community and the environment and usually all five kingdoms






14. 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






15. 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






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






17. Rock and soil surface






18. Consists of populations of different plants and animal species interacting with each other in a given environment






19. 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






20. First to resettle a virgin area






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






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






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






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






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






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






27. Conserve water actively






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






29. Body temperature is very close to that of their surroundings -as temperature rises - these organisms become more active






30. 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






31. 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






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






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






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






35. Animals that feed on secondary consumer






36. Deer - fox - woodchuck - and squirrel






37. 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






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






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






40. 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






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






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






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






44. Include saprophytic organisms and organisms of decay






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






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






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






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






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






50. The ultimate source of energy for all organisms