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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 feed on secondary consumer






2. Determines water holding capacity






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






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






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






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






7. Include reproduction and protection from predators and destructive weather






8. Forest floors contain moss and lichens






9. 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






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






11. Animals that consume primary consumers (carnivores)






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






13. The chief disruptive force






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






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






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






17. 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






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






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






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






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






22. The major component of the internal environment of all living things






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






24. Links between oceans and land






25. 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






26. 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






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






28. 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






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






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






31. 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






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






33. 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






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






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






36. Animals that consume dead animals






37. Lichens and moss






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






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






40. Deer - fox - woodchuck - and squirrel






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






42. The stable - living part of the ecosystem in whicih populations exist in balance with each other and with the environment






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






44. Symbiotic relationship from which both organisms derive some benefit






45. 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






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






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






48. Only animal life and other heterotrophic life exists






49. Include those protists and fungi that decompose dead organic matter externally and absorb the nutrients - they consistitute a vital link in the cycling of material within the ecosystem






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