3. When the Moon is in the position shown, how would the Moon look to an observer on the North Pole?

i think A

Explanation:

since its not in front of the moon and at the side it has to be a crescent moon and the sun is on the right side, so pick A

regulation of gene expression. gene expression can be regulated by various cellular processes with the aim to control the amount and nature of the expressed genes. these regulatory proteins bind to dna and send signals that indirectly control the rate of gene expression

explanation: