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






2. 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






3. Include saprophytic organisms and organisms of decay






4. 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






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






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






7. 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






8. The study of interactions between organisms and their environment






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






10. Elemental nitrogen is chemically inert and cannot be used by most organisms. Lightning and nitrogen-fixing bacteria in the roots of legumes change the nitrogen into the usable - soluble nitrates






11. 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






12. Vegetation such as vines and eppiphytes






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






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






15. Two species may rapidly evolve in divergent directions under the strong selection pressure resulting from intense competition. thus - the two species would rapidly evolve greater differences in their niches






16. 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






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






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






19. Symbiotic relationship from which both organisms derive some benefit






20. The nitrogen locked up in the wastes and dead tissues is released by the action of the bacteria of decay - which convert the proteins into ammonia






21. The oceans






22. Animals that feed on secondary consumer






23. Made into nitrites by chemosynthetic bacteria and then to usable nitrates by nitrifying bacteria






24. The ultimate source of energy for all organisms






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






26. 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






27. 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






28. 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






29. 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






30. Affect the type of vegetation that can be supported






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






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






33. 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






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






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






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






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






38. 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






39. Animals that consume primary consumers (carnivores)






40. Conserve water actively






41. Animals that consume dead animals






42. Deer - fox - woodchuck - and squirrel






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






44. Links between oceans and land






45. The orderly process by which one biotic community replaces or succeeds another until a climax community is established






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






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






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






49. Organisms that manufacture their own food






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