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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. Links between oceans and land






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






3. Crawling and sessile organsms






4. Symbiotic relationship from which both organisms derive some benefit






5. Individual unit of an ecological system - but the organism itself is composed of smaller units -organs >tissues >cells >molecules >atoms > subatomic particles






6. Conserve water actively






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






8. 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






9. 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






10. Animals that consume only plants or plant foods






11. Deer - fox - woodchuck - and squirrel






12. Rock and soil surface






13. Affect the type of vegetation that can be supported






14. Animals that eat both plants and animals






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






16. Encompasses all that is external to the organism and is necessary for its existence






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






18. 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






19. Animals that consume green plants (herbivores)






20. First to resettle a virgin area






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






22. Include saprophytic organisms and organisms of decay






23. The study of interactions between organisms and their environment






24. Only animal life and other heterotrophic life exists






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






26. Two species may rapidly evolve in divergent directions under the strong selection pressure resulting from intense competition. thus - the two species would rapidly evolve greater differences in their niches






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






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






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






30. Rivers - lakes - ponds - and marshes






31. Animals eat plants and use the digested nutrients to form carbohydrates - fats - and proteins characteristic of the species. a part of these organic compounds is used as fuel in respiration in plants and animals






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






33. The ultimate source of energy for all organisms






34. Developed long legs and many are hoofed






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






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






37. Adaptations for maintaining their internal osmolarity and conserving water






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






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






40. 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






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






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






43. Sunlit layer of the open sea extending to a depth of 250-600ft






44. Animals that feed on secondary consumer






45. 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






46. Lichens and moss






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






48. 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






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






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