BIOLOGY EOC REVIEW
ANSWER ALL QUESTIONS IN THIS SECTION
QUESTION 1
what are the two possible outcomes for a species after a disturbance - ANSWERS--
species may be uniquely adapted to the disturbance and be able to thrive
- species may not be able to adopt and may die/decline
QUESTION 2
primary succession - ANSWERS-follows on a site where the disturbance was so
great that nothing survived
- rivers depositing silt on reverted
- glaciers running over forests
QUESTION 3
secondary succession - ANSWERS-greatly disrupts but doesn't illuminate
population
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- hurricane
QUESTION 4
pioneer species - ANSWERS-plants that can grow in newly created, barren, or
altered environments
QUESTION 5
how does the earth compensate for the fact that there are a limited number of
important chemicals on earthh - ANSWERS-elements are transferred back and
forth from abiotic to biotic compartments of an ecosystem
- known as biogeochemical cycles
QUESTION 6
where can carbon be found on earth - ANSWERS-atmosphere
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QUESTION 7
what is the carbon cycle - ANSWERS-process of transferring carbon between
earth's living organisms and earth's geological elements (cellular respiration)
QUESTION 8
what is the nitrogen cycle - ANSWERS-the pathway for movement of the element
nitrogen among earth's living organisms, waters, rocks and minerals, and
atmosphere
QUESTION 9
why is nitrogen important - ANSWERS-essential in the formation of amino acids
and proteins as well as the formation of DNA
QUESTION 10
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nitrogen fixation - ANSWERS-the process whereby certain soil bacteria breaks
down N2, and nitrogen found in dead organic matter and convert it to either nitrate
or ammonia, a form of nitrogen that is easily absorbed by the roots of plants
QUESTION 11
denitrification - ANSWERS-process in which, under lower conditions in the soil
and marine environment, bacteria converts nitrate back to N2 , for use in the
atmosphere
QUESTION 12
what is the phosphorus cycle - ANSWERS-phosphorus finds its way to land via
hurricane, tsunamis, earthquakes, and volcanic activity
***phosphorus is found in water, soils, or roots***
QUESTION 13
why is phosphorus important - ANSWERS-- it is part of DNA and ATP
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