BIO 131 Exam 2 2026 | Practice Questions &
Verified Answers | Cell Biology, Genetics &
Metabolism Review
The type of selection that tends to act against extremes in
phenotype so that an average is favored is - Precise Answer
✔✔Stabilizing selection
The most common source of recombination in the cells of
eukaryotes is - Precise Answer ✔✔Sexual reproduction
Directional selection - Precise Answer ✔✔shifts the frequency
of one or more traits in a particular direction.
Fossil evidence indicates that horses have gradually increased in
size over geologic time. This is an example of - Precise Answer
✔✔directional selection
The force in nature which distinguishes between unfit and fit
individuals is called - Precise Answer ✔✔natural selection
Currently, scientists believe that human genome has
approximately __ protein-coding genes - Precise Answer
✔✔20000
__ is an enzyme responsible for RNA synthesis during
transcription - Precise Answer ✔✔RNA polymerase
The stage of aerobic respiration in which glucose is broken
, down to pyruvic acid (or pyruvate) is - Precise Answer
✔✔glycolysis
Which of the following statements is correct about
photosynthesis - Precise Answer ✔✔oxygen is given off during
photosynthesis
Bacteria need oxygen to break down algae (true/false) - Precise
Answer ✔✔true
Algae is a type of (choose the most accurate group) - Precise
Answer ✔✔Phytoplankton
Which of the following is a biological consequence of dead
zones? - Precise Answer ✔✔Aquatic diversity decreases
Military personnel had to be deployed to remove algae blooms
so save an olympic sailing competition (true/false) - Precise
Answer ✔✔true
Process of eutrophication - Precise Answer ✔✔1) Excess N
and/or P into water body
2) Bacteria break down and decompose the algae
3) Toxic algae begins to grow and an algal bloom occurs
4) Oxygen is depleted from the body of water
5) Fish and other marine organism suffocate due to the lack of
oxygen
6) Fish and other marine organisms suffocate due to the lack of
oxygen
Verified Answers | Cell Biology, Genetics &
Metabolism Review
The type of selection that tends to act against extremes in
phenotype so that an average is favored is - Precise Answer
✔✔Stabilizing selection
The most common source of recombination in the cells of
eukaryotes is - Precise Answer ✔✔Sexual reproduction
Directional selection - Precise Answer ✔✔shifts the frequency
of one or more traits in a particular direction.
Fossil evidence indicates that horses have gradually increased in
size over geologic time. This is an example of - Precise Answer
✔✔directional selection
The force in nature which distinguishes between unfit and fit
individuals is called - Precise Answer ✔✔natural selection
Currently, scientists believe that human genome has
approximately __ protein-coding genes - Precise Answer
✔✔20000
__ is an enzyme responsible for RNA synthesis during
transcription - Precise Answer ✔✔RNA polymerase
The stage of aerobic respiration in which glucose is broken
, down to pyruvic acid (or pyruvate) is - Precise Answer
✔✔glycolysis
Which of the following statements is correct about
photosynthesis - Precise Answer ✔✔oxygen is given off during
photosynthesis
Bacteria need oxygen to break down algae (true/false) - Precise
Answer ✔✔true
Algae is a type of (choose the most accurate group) - Precise
Answer ✔✔Phytoplankton
Which of the following is a biological consequence of dead
zones? - Precise Answer ✔✔Aquatic diversity decreases
Military personnel had to be deployed to remove algae blooms
so save an olympic sailing competition (true/false) - Precise
Answer ✔✔true
Process of eutrophication - Precise Answer ✔✔1) Excess N
and/or P into water body
2) Bacteria break down and decompose the algae
3) Toxic algae begins to grow and an algal bloom occurs
4) Oxygen is depleted from the body of water
5) Fish and other marine organism suffocate due to the lack of
oxygen
6) Fish and other marine organisms suffocate due to the lack of
oxygen
