<span>The upstairs of a house being warmer than the downstairs is an example of heat transfer by -- convection</span>
<span>new scientific investigations lead to new theories</span>
Because there are not strictly green and yellow plants, this means that
the color can be affected by multiple genes. If it was only affected by
one gene then you would see only the two groups for the color, green and
yellow. The answer is D
<span>There are several genes that control the color.
</span>
D) dilating sureface blood vessels
When you're out in cold weather, your skin triggers shivering so the blood vessels will contract and keep you as warm as possible. But if there's a heat wave, you'll sweat to increase the blood flow to the capillaries, which in turn increases sweating. This process cools you off as the water evaporates from your skin.