Squeezing the heart so blood moves through the
heart's chambers and then
into blood vessels that lead to
the body.

The (blank) states that all loving things are made of cells.

The earth formed roughly 4.5 billion years ago, yet evidence of life dates back to about 3.5 billion years ago. which one is not a possible hypothesis of how life on earth arose?

Which best describes somatic mutations? they are usually passed on to offspring. they can cause different kinds of cancer. they always result from point mutations. they only occur in reproductive cell