Biology EOC Practice Exam Questions and
Answers Verified by Experts
A strand of DNA is exposed to intense heat. Which of these best describes what will happen to
the strand of DNA? the chemical bonds of the DNA molecule will be broken
Which structure is primarily responsible for direction all processes of a plant cell?
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... natural selection
What is the role of hydrogen bonds in the structure of DNA? to connect the base pairs
Which process allows for an organism to increase the number of body cells during
development? 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? 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? the would become extinct
Which of these would lead to a lower rate of photosynthesis in a plant? a decrease in the
amount of carbon dioxide in the air
What is the result of the fertilization of an egg? it restores the diploid number of
chromosomes
Which of these best describes the initial change caused by a DNA mutation? a change in
the sequence of base pairs
Answers Verified by Experts
A strand of DNA is exposed to intense heat. Which of these best describes what will happen to
the strand of DNA? the chemical bonds of the DNA molecule will be broken
Which structure is primarily responsible for direction all processes of a plant cell?
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... natural selection
What is the role of hydrogen bonds in the structure of DNA? to connect the base pairs
Which process allows for an organism to increase the number of body cells during
development? 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? 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? the would become extinct
Which of these would lead to a lower rate of photosynthesis in a plant? a decrease in the
amount of carbon dioxide in the air
What is the result of the fertilization of an egg? it restores the diploid number of
chromosomes
Which of these best describes the initial change caused by a DNA mutation? a change in
the sequence of base pairs
