Answer:
small heart-like pumps
Explanation:
Here is the complete question:.
Which of the following mechanisms is NOT used to propel lymph through lymphatic vessels?
small heart-like pumps
gravity
the milking action of muscles
pulmonary motion
And the answer is
small heart-like pumps
Explanation:
It was originally thought that eukaryotes were more closely related than bacteria and eukaryotes. However, evidence now supports the fact that both archaea and bacteria were responsible for the formation of more complex cells.
The answer is chemical energy I believe