When it is summer at the south pole, a. the northern hemisphere is tilted toward the sun. b. the southern hemisphere is tilted away from the sun. c. the northern hemisphere is tilted away from the sun. d. both the southern and northern hemispheres are tilted toward the sun.

The correct answer is option C

When the sun is tilted towards the southern hemisphere it will receive maximum amount of sunlight and will have the hottest day as summers. This occurs on 21 December when the direct sunlight falls on the Southern hemisphere having longest day. During this time the Northern Hemisphere is having the shortest day as it is tilted away from the sun.

answer: a. a gene that causes a specific trait.

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: