South Carolina Biology EOC Exam
Review Questions with Correct
Answers||100% Guaranteed Pass||A+
Graded||Updated 2025/2026
Syllabus||<<Newest Version>>
what happens during the krebs cycle - ANSWER ✓ pyruvat enters the
mitochondria, marks NADH electron transport and FADH2 (electron carrier) to
make ATP
Cellular Respiration equation - ANSWER ✓ 6O2 + C6H120 -----energy--> 6CO2
+ 6H2O
what is the three carbon compound made from glycolysis - ANSWER ✓ pyruvic
acid/pyruvate
fermentation - ANSWER ✓ releases energy from food molecules by producing
ATP in the absence of oxygen
what are the two main types of fermentation - ANSWER ✓ alcoholic- pyruvic
acid is converted into ethyl alcohol and carbon dioxide
lactic acid- pyruvic acid that accumulates as a result of glycolysis can be converted
to lactic acid
ecosystem - ANSWER ✓ grouping of organisms living together and interacting
with each other and the environment, including nonliving components
populations - ANSWER ✓ a group of individuals of the same species living in the
same area
community - ANSWER ✓ all the interacting populations within an area
,predation - ANSWER ✓ occurs when one organism, the predator, eats another, the
prey
example: shark and fish
mutualism - ANSWER ✓ mutually beneficial for both organisms
commensulism - ANSWER ✓ one organism benefits while the other is neither
harmed nor helped
parisitism - ANSWER ✓ one organism benefits at the expense of the other
population density - ANSWER ✓ the number of individuals of the same species
living in a designated unit of space
niche - ANSWER ✓ the sum of all activities and interactions a species has, both
with living and nonliving things, that determine where it can grow and survive
density dependent limiting factor - ANSWER ✓ any factor limiting the size of a
population whose effect is dependent on the number of individuals in the
population
carrying capacity - ANSWER ✓ max number of individuals in a population that
can be supported in a given area
immigration - ANSWER ✓ the entry of a new individual or individuals from
outside of the population
emigration - ANSWER ✓ the exit of an individual or individuals out of a
population
succession - ANSWER ✓ the natural process following a disturbance where one
community of plants and animals gradually replaces another
primary succession - ANSWER ✓ follows on a site where the disturbance was so
great that nothing survived
- rivers depositing silt on reverted
, - glaciers running over forests
secondary succession - ANSWER ✓ greatly disrupts but doesn't illuminate
population
- hurricane
pioneer species - ANSWER ✓ plants that can grow in newly created, barren, or
altered environments
what is the carbon cycle - ANSWER ✓ process of transferring carbon between
earth's living organisms and earth's geological elements (cellular respiration)
what is the nitrogen cycle - ANSWER ✓ the pathway for movement of the
element nitrogen among earth's living organisms, waters, rocks and minerals, and
atmosphere
why is nitrogen important - ANSWER ✓ essential in the formation of amino acids
and proteins as well as the formation of DNA
what is the phosphorus cycle - ANSWER ✓ phosphorus finds its way to land via
hurricane, tsunamis, earthquakes, and volcanic activity
***phosphorus is found in water, soils, or roots***
water cycle - ANSWER ✓
Plants use CO2 in the process of ______________ to make ____________ and
oxyen - ANSWER ✓ photosynthesis, sugar
Animals use oxygen in the process of _____________ and make more CO2. -
ANSWER ✓ respiration
More CO2 is released in the atmosphere today than in the past because of
________________________. - ANSWER ✓ burning of fossil fuels
Too much CO2 in the atmosphere may be responsible for the
________________________ effect. - ANSWER ✓ greenhouse
Review Questions with Correct
Answers||100% Guaranteed Pass||A+
Graded||Updated 2025/2026
Syllabus||<<Newest Version>>
what happens during the krebs cycle - ANSWER ✓ pyruvat enters the
mitochondria, marks NADH electron transport and FADH2 (electron carrier) to
make ATP
Cellular Respiration equation - ANSWER ✓ 6O2 + C6H120 -----energy--> 6CO2
+ 6H2O
what is the three carbon compound made from glycolysis - ANSWER ✓ pyruvic
acid/pyruvate
fermentation - ANSWER ✓ releases energy from food molecules by producing
ATP in the absence of oxygen
what are the two main types of fermentation - ANSWER ✓ alcoholic- pyruvic
acid is converted into ethyl alcohol and carbon dioxide
lactic acid- pyruvic acid that accumulates as a result of glycolysis can be converted
to lactic acid
ecosystem - ANSWER ✓ grouping of organisms living together and interacting
with each other and the environment, including nonliving components
populations - ANSWER ✓ a group of individuals of the same species living in the
same area
community - ANSWER ✓ all the interacting populations within an area
,predation - ANSWER ✓ occurs when one organism, the predator, eats another, the
prey
example: shark and fish
mutualism - ANSWER ✓ mutually beneficial for both organisms
commensulism - ANSWER ✓ one organism benefits while the other is neither
harmed nor helped
parisitism - ANSWER ✓ one organism benefits at the expense of the other
population density - ANSWER ✓ the number of individuals of the same species
living in a designated unit of space
niche - ANSWER ✓ the sum of all activities and interactions a species has, both
with living and nonliving things, that determine where it can grow and survive
density dependent limiting factor - ANSWER ✓ any factor limiting the size of a
population whose effect is dependent on the number of individuals in the
population
carrying capacity - ANSWER ✓ max number of individuals in a population that
can be supported in a given area
immigration - ANSWER ✓ the entry of a new individual or individuals from
outside of the population
emigration - ANSWER ✓ the exit of an individual or individuals out of a
population
succession - ANSWER ✓ the natural process following a disturbance where one
community of plants and animals gradually replaces another
primary succession - ANSWER ✓ follows on a site where the disturbance was so
great that nothing survived
- rivers depositing silt on reverted
, - glaciers running over forests
secondary succession - ANSWER ✓ greatly disrupts but doesn't illuminate
population
- hurricane
pioneer species - ANSWER ✓ plants that can grow in newly created, barren, or
altered environments
what is the carbon cycle - ANSWER ✓ process of transferring carbon between
earth's living organisms and earth's geological elements (cellular respiration)
what is the nitrogen cycle - ANSWER ✓ the pathway for movement of the
element nitrogen among earth's living organisms, waters, rocks and minerals, and
atmosphere
why is nitrogen important - ANSWER ✓ essential in the formation of amino acids
and proteins as well as the formation of DNA
what is the phosphorus cycle - ANSWER ✓ phosphorus finds its way to land via
hurricane, tsunamis, earthquakes, and volcanic activity
***phosphorus is found in water, soils, or roots***
water cycle - ANSWER ✓
Plants use CO2 in the process of ______________ to make ____________ and
oxyen - ANSWER ✓ photosynthesis, sugar
Animals use oxygen in the process of _____________ and make more CO2. -
ANSWER ✓ respiration
More CO2 is released in the atmosphere today than in the past because of
________________________. - ANSWER ✓ burning of fossil fuels
Too much CO2 in the atmosphere may be responsible for the
________________________ effect. - ANSWER ✓ greenhouse
