Biology EOC Practice Exam UPDATED
ACTUAL Questions and CORRECT
Answers
The gopher snake uses its glottis to produce a hiss that sounds similar to a rattlesnake's rattle.
What is the most likely reason a gopher snake would do this? - CORRECT ANSWER - to
confuse predators
A population of salamanders that line in a river require clear, fresh water to survive. A flood
causes tons of sediments to be suspended in the river. Which of these most likely will happen to
the salamander population? - CORRECT ANSWER - the salamanders will decrease in
number because of the water quality
The diagram shows a food web, a reduction in which of these species would lead to a decrease in
all the other populations in the web? - CORRECT ANSWER - Grass/Trees
Which of these best explains the difference between the way animals and plants exchange gases
with their environments? - CORRECT ANSWER - Animals use only respiration; while
plants use both photosynthesis and respiration
What is the main function of a selectively permeable cell membrane? - CORRECT
ANSWER - regulates what enters and leaves the cell
The Papaya mealybug is a pest that poses a threat to many tropical plants. Which fate of the
mealybug would result from the inability of the species to reproduce? - CORRECT
ANSWER - the species would become extinct
In a certain insect, round wings (H) are dominant to pointed wings (h). What cross will produce
the greatest number of genotypic and phenotypic variations? - CORRECT ANSWER - Hh
x Hh
, Polar bears swim across large expanses of ocean while hunting for seals, their main source of
food. The bears use sea ice as resting spots during their long swims. However, the sea ice is
rapidly melting as a result of global warming. Which statement describes what most likely will
happen if global warming continues at present rate? - CORRECT ANSWER - Polar bears
populations will decrease, and seal populations will increase
A strand of DNA is exposed to intense heat. Which of these best describes what will happen to
the strand of DNA? - CORRECT ANSWER - the chemical bonds of the DNA molecule
will be broken
Which structure is primarily responsible for direction all processes of a plant cell? - CORRECT
ANSWER - Nucleus
The loss of habitat in a forest region has caused some plant species to become extinct, while
others survive. The process by which some plants species survive and others do not in a
changing environment is best explained by... - CORRECT ANSWER - natural selection
What is the role of hydrogen bonds in the structure of DNA? - CORRECT ANSWER - to
connect the base pairs
Which process allows for an organism to increase the number of body cells during development?
- CORRECT ANSWER - Mitosis
A forest fire destroys the majority of the trees in a state park. Which effect will this most likely
have on the secondary consumers in that ecosystem? - CORRECT ANSWER - The
amount of available energy will decrease because fewer primary consumers will survive the lack
of vegetation.
The loulu tree in Hawaii reproduces by a see encased in fruit. Non-native species, such as pigs
and rats, eat the fruit as a regular part of their diet, drastically reducing the regeneration rate of
the loulu. What most likely would be the outcome for loulu trees in the next century without
intervention? - CORRECT ANSWER - the would become extinct
ACTUAL Questions and CORRECT
Answers
The gopher snake uses its glottis to produce a hiss that sounds similar to a rattlesnake's rattle.
What is the most likely reason a gopher snake would do this? - CORRECT ANSWER - to
confuse predators
A population of salamanders that line in a river require clear, fresh water to survive. A flood
causes tons of sediments to be suspended in the river. Which of these most likely will happen to
the salamander population? - CORRECT ANSWER - the salamanders will decrease in
number because of the water quality
The diagram shows a food web, a reduction in which of these species would lead to a decrease in
all the other populations in the web? - CORRECT ANSWER - Grass/Trees
Which of these best explains the difference between the way animals and plants exchange gases
with their environments? - CORRECT ANSWER - Animals use only respiration; while
plants use both photosynthesis and respiration
What is the main function of a selectively permeable cell membrane? - CORRECT
ANSWER - regulates what enters and leaves the cell
The Papaya mealybug is a pest that poses a threat to many tropical plants. Which fate of the
mealybug would result from the inability of the species to reproduce? - CORRECT
ANSWER - the species would become extinct
In a certain insect, round wings (H) are dominant to pointed wings (h). What cross will produce
the greatest number of genotypic and phenotypic variations? - CORRECT ANSWER - Hh
x Hh
, Polar bears swim across large expanses of ocean while hunting for seals, their main source of
food. The bears use sea ice as resting spots during their long swims. However, the sea ice is
rapidly melting as a result of global warming. Which statement describes what most likely will
happen if global warming continues at present rate? - CORRECT ANSWER - Polar bears
populations will decrease, and seal populations will increase
A strand of DNA is exposed to intense heat. Which of these best describes what will happen to
the strand of DNA? - CORRECT ANSWER - the chemical bonds of the DNA molecule
will be broken
Which structure is primarily responsible for direction all processes of a plant cell? - CORRECT
ANSWER - Nucleus
The loss of habitat in a forest region has caused some plant species to become extinct, while
others survive. The process by which some plants species survive and others do not in a
changing environment is best explained by... - CORRECT ANSWER - natural selection
What is the role of hydrogen bonds in the structure of DNA? - CORRECT ANSWER - to
connect the base pairs
Which process allows for an organism to increase the number of body cells during development?
- CORRECT ANSWER - Mitosis
A forest fire destroys the majority of the trees in a state park. Which effect will this most likely
have on the secondary consumers in that ecosystem? - CORRECT ANSWER - The
amount of available energy will decrease because fewer primary consumers will survive the lack
of vegetation.
The loulu tree in Hawaii reproduces by a see encased in fruit. Non-native species, such as pigs
and rats, eat the fruit as a regular part of their diet, drastically reducing the regeneration rate of
the loulu. What most likely would be the outcome for loulu trees in the next century without
intervention? - CORRECT ANSWER - the would become extinct
