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






2. Symbiotic relationship from which both organisms derive some benefit






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






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






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






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






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






9. 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






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






11. 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






12. 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






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






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






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






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






17. Adaptations for maintaining their internal osmolarity and conserving water






18. Include reproduction and protection from predators and destructive weather






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






20. 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






21. Forest floors contain moss and lichens






22. The chief disruptive force






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






24. Animals that consume primary consumers (carnivores)






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






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






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






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






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






30. 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






31. Links between oceans and land






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






33. Regiong beneatht he photic zone that receives no light






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






35. 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






36. 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






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






38. Crawling and sessile organsms






39. The ultimate source of energy for all organisms






40. Rock and soil surface






41. Distinct community in a geographic region






42. 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






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






44. Polar bears - musk oxen - and arctic hens






45. The nitrogen locked up in the wastes and dead tissues is released by the action of the bacteria of decay - which convert the proteins into ammonia






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






47. Animals that consume green plants (herbivores)






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






49. Rivers - lakes - ponds - and marshes






50. Made into nitrites by chemosynthetic bacteria and then to usable nitrates by nitrifying bacteria







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