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. Adaptations for maintaining their internal osmolarity and conserving water






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






3. 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






4. 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






5. Vegetation such as vines and eppiphytes






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






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






8. Free-living organisms that feed on other living organisms






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






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






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






12. Animals that consume primary consumers (carnivores)






13. Developed long legs and many are hoofed






14. Animals that consume only plants or plant foods






15. The chief disruptive force






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






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






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






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






20. Evolve toward a balance in which the predator is a regulatory influence on th prey but not a threat to its survival






21. Animals that eat both plants and animals






22. 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






23. 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






24. 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






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






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






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






28. Animals that consume green plants (herbivores)






29. 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






30. Forest floors contain moss and lichens






31. 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






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






33. Material is cycled and recycled betweenn organisms and their environments - passing from inorganic forms to organic forms and then back to the inorganic forms






34. 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






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






36. Animals that consume dead animals






37. 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






38. The oceans






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






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






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






42. Oceans connect to form one continuous body of water - which controls the earth's temperature by absorbing solar heat






43. Conserve water actively






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






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






46. 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






47. The vegetation that becomes dominant and stable after years of evolutiionary development






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






49. Polar bears - musk oxen - and arctic hens






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







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