<span>Humans shouldn't use nonrenewable sources otherwise the resources will disappear. Renewable Sources: Sun, wind, maybe water.</span>
Blubber is a thick layer of fat (adipose) tissue. Animals store extra digested food in the form of adipose tissue, which contains molecules called lipids.
The earthworm has a closed circulatory system. An earthwormcirculates blood exclusively through vessels. There are three main vessels that supply the blood to organs within the earthworm. These vessels are the aortic arches, dorsal blood vessels, and ventral blood vessel
Natural Selection helps animals survive in their habitats and they have adaptations to help them survive better.
