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. Include those protists and fungi that decompose dead organic matter externally and absorb the nutrients - they consistitute a vital link in the cycling of material within the ecosystem






2. Regiong beneatht he photic zone that receives no light






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






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






6. Animals that consume only plants or plant foods






7. Lichens and moss






8. Animals that consume dead animals






9. 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






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






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






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






13. Forest floors contain moss and lichens






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






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






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






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






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






19. Animals that eat both plants and animals






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






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






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






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






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






25. The chief disruptive force






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






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






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






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






30. 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






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






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






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






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






35. The oceans






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






37. Links between oceans and land






38. The study of interactions between organisms and their environment






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






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






41. 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






42. Animals that feed on secondary consumer






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






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






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






46. Animals that consume primary consumers (carnivores)






47. 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






48. Vegetation such as vines and eppiphytes






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






50. Crawling and sessile organsms






Can you answer 50 questions in 15 minutes?



Let me suggest you:

Browse all subjects

Browse all tests

Most popular tests



Major Subjects

Tests & Exams


AP
CLEP
DSST
GRE
SAT
GMAT

Browse all subjects

Browse all tests

Most popular tests