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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. Any group of similar organisms that are capable of reproducing






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






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






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






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






6. First to resettle a virgin area






7. 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






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






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






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






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






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






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






14. Animals that eat both plants and animals






15. 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






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






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. Freshwater Biomes vs. Saltwater 3: Freshwater biomes - except very large lakes - are affected by variations in _________. temperature of freshwater bodies varies considerably; they may freeze or dry up - and mud from their floors may be stirred up by






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






20. Determines water holding capacity






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






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






23. 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






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






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






26. Rivers - lakes - ponds - and marshes






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






28. Links between oceans and land






29. Animals that consume only plants or plant foods






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






31. When one organism is benefited by the association and the other is not affected






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






33. Distinct community in a geographic region






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






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






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






37. Treeless - frozen plain found between the taiga lands and the northern ice sheets - very short summer and thus a very short growing season during which time the ground becomes wet and marshy






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






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






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






41. Conserve water actively






42. 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






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






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






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






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






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






48. 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






49. The study of interactions between organisms and their environment






50. 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