Answer:
the right awnser is 3 b and 1 w vote brainliest this is right.
Explanation:
The R group varies, and it is the carbon-phosphate backbone
Traits such as skin color and height are variable throughout the human population because these traits are controlled by more than one cell. The cells don't perform at the same rate and don't produce the same biomolecules. Therefore, the maximum height of a person is not achieved which results to variations.
Industrial Age!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
