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. Organisms that manufacture their own food






2. 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






3. Needs constant energy source and cycling of materials between the living system






4. 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






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






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






7. 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






8. Autotrophic green plants and chemosynthetic bacteria that use the energy of the sun and simple raw materials to manufacture carbohydrates - proteins - and lipids






9. The ultimate source of energy for all organisms






10. Animals that consume only plants or plant foods






11. Animals that eat both plants and animals






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






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






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






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






16. Gaseous CO2 enters the living world when plants use it to produce glucose via photosynthesis. The carbon atoms in CO2 are bonded to hydrogen and other carbon atoms. the plant uses the glucose to make starch - proteins - and fat






17. 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






18. 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






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






20. 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






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






22. Determines water holding capacity






23. Crawling and sessile organsms






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






25. Because organisms at the upper levels of the food chain derive their food energy from organisms at lower levels - and because energy is lost from one level to the next - each level can support a successively smaller biomass






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






27. Only animal life and other heterotrophic life exists






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






29. 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






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






31. 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






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






33. Polar bears - musk oxen - and arctic hens






34. Vegetation such as vines and eppiphytes






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






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






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






38. Lichens and moss






39. 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






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






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






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






43. Regiong beneatht he photic zone that receives no light






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






45. Animals that consume primary consumers (carnivores)






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






47. Developed long legs and many are hoofed






48. 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






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






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







Sorry!:) No result found.

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