Test your basic knowledge |

PCAT Biology Ecology

Subjects : pcat, biology
  • 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. Rhododendrons and pines are more suited for growth in acid oil

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

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

4. The ultimate source of energy for all organisms

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

6. The oceans

7. Adaptations for maintaining their internal osmolarity and conserving water

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

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

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

11. 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

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

13. Chief animal inhabitant is the moose; however - the black bear - wolf - and some birds

14. 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

15. 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

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

17. Regiong beneatht he photic zone that receives no light

18. Animals that consume primary consumers (carnivores)

19. Algae - crabs - crustacea - and many different species of fish

20. Have cold winters - warm summers - and moderate rainfall -found in the Northeast and Central-Eastern United States and Central Europe

21. Cannot synthesize their ow food and must depend upon autotrophs or others in the ecosystem to obtain their food

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. 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. Recycle water - oxygen - and phosphorus

25. Receive less than ten inches of rain each year; the rain is concentrated within a few heavy cloudbursts -ex: Sahara in Africa and Gobi in Asia

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

27. 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

28. 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

29. 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

30. Animals that feed on secondary consumer

31. Affect the type of vegetation that can be supported

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

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

34. The study of interactions between organisms and their environment

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

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

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

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

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

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

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

42. 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

43. Rock and soil surface

44. Distinct community in a geographic region

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

46. Rivers - lakes - ponds - and marshes

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

48. Only animal life and other heterotrophic life exists

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

50. Animals that consume only plants or plant foods