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






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






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






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






5. One or both organisms can't survive without the other






6. Conserve water actively






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






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






9. Adaptations for maintaining their internal osmolarity and conserving water






10. Algae - sponges - clams - snails - sea urchins - starfish - and crabs






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






12. Developed long legs and many are hoofed






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






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






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






16. The oceans






17. 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






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






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






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






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






22. Crawling and sessile organsms






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






24. 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






25. The chief disruptive force






26. Symbiotic relationship from which both organisms derive some benefit






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






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






29. Vegetation such as vines and eppiphytes






30. 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






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






32. 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






33. Animals that consume dead animals






34. 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






35. Each member of a food chain uses some of the energy it obtains from its food for its own metabolism and loses some additional energy in the form of heat






36. Regiong beneatht he photic zone that receives no light






37. Links between oceans and land






38. Region exposed to low tides that undergoes variations in temperature and periods of dryness






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






40. 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






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






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






43. Lichens and moss






44. 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






45. 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






46. Animals that feed on secondary consumer






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






48. Recycle water - oxygen - and phosphorus






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






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






Can you answer 50 questions in 15 minutes?



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