Test your basic knowledge |

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






2. 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






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






4. The ultimate source of energy for all organisms






5. 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






6. Animals that consume dead animals






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






8. 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






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






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






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






12. 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






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






14. Conserve water actively






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






16. Regiong beneatht he photic zone that receives no light






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






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






20. Rivers - lakes - ponds - and marshes






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






22. Animals that feed on secondary consumer






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






24. Distinct community in a geographic region






25. 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






26. 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






27. Recycle water - oxygen - and phosphorus






28. The oceans






29. First to resettle a virgin area






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






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






32. Affect the type of vegetation that can be supported






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






34. 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






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






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






37. Deer - fox - woodchuck - and squirrel






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






39. Developed long legs and many are hoofed






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






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






42. Determines water holding capacity






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






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






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






46. Adaptations for maintaining their internal osmolarity and conserving water






47. 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






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






49. 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






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