NEED HELP ASAP A gene is a segment of DNA that codes for a single protein.

Question 1 options:
True
False
Question 2 (1 point)
Cell differentiation (example a muscle cell is different than a nerve cell) occurs because:

Question 2 options:

genes are turned on or off based on the cells needs

all of the cells contain different genes

extra genes are added if the cell needs them

genes are destroyed

MY ANSWERS ARE A AND D

Select the correct answer. which mutation is harmful to the organism? a. a mutation allowing moths to camouflage better on blackened tree bark b. a mutation making staphylococcus aureus resistant to the antibiotic methicillin c. a mutation inhibiting human immunodeficiency virus from attaching to and entering the cell d. a mutation causing uncontrolled cell division e. a mutation giving plant leaves a bitter taste to discourage herbivores from eating them