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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 consume only plants or plant foods






2. Conserve water actively






3. Include reproduction and protection from predators and destructive weather






4. 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






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






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






7. Deer - fox - woodchuck - and squirrel






8. 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






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






10. 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






11. Ammonia (NH3) is broken down to release free nitrogen - which returns to the beginning of the denitrifying






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






13. Animals that eat both plants and animals






14. Only animal life and other heterotrophic life exists






15. Animals that consume primary consumers (carnivores)






16. 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






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






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






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






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






21. Have adaptations enabling them to survive in very cod water - with high pressures - and in complete darkness






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






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






24. Distinct community in a geographic region






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






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






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






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






29. 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






30. More than 70% of earth -plants have little controlling influence in communities -most stable ecosystems; the conditions affecting temperature - amount of available oxygen and cabon dioxide - and amount of suspended or dissolve materials are very stab






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






32. Rock and soil surface






33. Developed long legs and many are hoofed






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






35. 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






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






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






38. Include saprophytic organisms and organisms of decay






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






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






41. Adaptations for maintaining their internal osmolarity and conserving water






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






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






44. 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






45. Food chain is not a simple linear chain but an intricate web






46. Animals that feed on secondary consumer






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






48. 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






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






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