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






2. Vegetation has evolved adaptations for water conservation such as needle shaped leaves






3. Animals that consume dead animals






4. 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






5. 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






6. Crawling and sessile organsms






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






8. 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






9. Include saprophytic organisms and organisms of decay






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






11. Distinct community in a geographic region






12. Conserve water actively






13. Regiong beneatht he photic zone that receives no light






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






15. Developed long legs and many are hoofed






16. Deer - fox - woodchuck - and squirrel






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






18. 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






19. 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






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






21. The study of interactions between organisms and their environment






22. Determines water holding capacity






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






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






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






26. 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






27. 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






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






29. First to resettle a virgin area






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






31. Nitrates are absorbed by plants are used to syntheisze nucleic acids and plant proteins






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






33. 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






34. Polar bears - musk oxen - and arctic hens






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






36. Animals that consume only plants or plant foods






37. 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






38. 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






39. Adaptations for maintaining their internal osmolarity and conserving water






40. Lichens and moss






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






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






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






44. Organisms that manufacture their own food






45. Group of organisms of the same species living together in a given location






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






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






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






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






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