What is the main function of the endocrine system? a) to sense the environment
b) to transport materials throughout the body
c) to secrete hormones
d) to break down food into smaller parts

c

Explanation:

to secrete hormones.this let the harmones travel to cells in other parts of body.

the dna molecules have a negative charge because of the phosphate groups in their sugar-phosphate backbone, so they start moving through the matrix of the gel towards the positive pole. power is turned on and dna fragments migrate through gel (towards the positive electrode).

explanation: