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






2. Animals that consume green plants (herbivores)






3. Developed long legs and many are hoofed






4. Every energy transfer involves a loss of energy and each level of the food chain uses some of the energy it obtains from the food for its own metabolism and loses some additional energy in the form of heat






5. Crawling and sessile organsms






6. The chief disruptive force






7. Rivers - lakes - ponds - and marshes






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






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






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






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






12. The study of interactions between organisms and their environment






13. Elemental nitrogen is chemically inert and cannot be used by most organisms. Lightning and nitrogen-fixing bacteria in the roots of legumes change the nitrogen into the usable - soluble nitrates






14. Include reproduction and protection from predators and destructive weather






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






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






17. Animals that feed on secondary consumer






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






19. 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






20. Polar bears - musk oxen - and arctic hens






21. Animals that eat both plants and animals






22. 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






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






24. Conserve water actively






25. Frozen area with no vegetation and terrestrial animals -animals that do inhabit polar regions generally live near the polar oceans






26. Links between oceans and land






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






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






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






30. First to resettle a virgin area






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






32. 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






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






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






35. Animals that consume primary consumers (carnivores)






36. Determines water holding capacity






37. Forest floors contain moss and lichens






38. The ultimate source of energy for all organisms






39. Recycle water - oxygen - and phosphorus






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






41. 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






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






43. Vegetation such as vines and eppiphytes






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






45. 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






46. The oceans






47. Organisms that manufacture their own food






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






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






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