Why do some dna fragments move farther than others during gel electrophoresis? a. because their shapes are different b. because they are different types of molecules c. because the samples are different colors d. because their masses are different

D because their masses are different

Explanation:

they undergo a push by the electric field

the heavier strand moves the least and the lightest moves the most

B: Their masses are different.

Explanation:

A P E X

1. efficient use of space

2. elimination of groundwater contamination

3. energy generation

4. lower carbon footprint