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. Animals that eat both plants and animals






2. 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






3. Deer - fox - woodchuck - and squirrel






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






5. Crawling and sessile organsms






6. Recycle water - oxygen - and phosphorus






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






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






9. 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






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






11. Adaptations for maintaining their internal osmolarity and conserving water






12. 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






13. Organisms that manufacture their own food






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






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






16. Regiong beneatht he photic zone that receives no light






17. Include reproduction and protection from predators and destructive weather






18. Must be maintained at an optimal level -organisms have adaptations necessary for protection against extremes






19. 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






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






21. 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






22. The study of interactions between organisms and their environment






23. 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






24. Links between oceans and land






25. The chief disruptive force






26. Freshwater Biomes vs. Saltwater 2: In rivers and streams - strong swift currents exist - and thus fish that have developed strong muscles and plants with _____________ have survived






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






28. Contains plankton - passively drifting masses of microscopic photosynthetic and heterotrophic organisms - and nekton - and algae






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






30. 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






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






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






33. Developed long legs and many are hoofed






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






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






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






37. Distinct community in a geographic region






38. 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






39. 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






40. Animals that consume only plants or plant foods






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






42. Rivers - lakes - ponds - and marshes






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






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






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






46. 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






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






48. The ultimate source of energy for all organisms






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






50. The oceans