To survive hunter-gatherers changed their environment by

O burning the prairies to prevent trees from growing.

O neither (a) nor (b)

O Cultivating plants closer to where they lived.

burning the prairies to prevent trees from growing.

Explanation: hope this helps

cats appear to have glowing cat eyes because the back of their eyeballs includes a special reflective surface called the tapetum lucidum. this lets them see better during the night, giving them a much better vision.

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: