I would say gills and webbed limbs. If they are amphibious, then I would say webbed feet and webbed arms.
The major source of energy for all things comes from the Sun
Nucleus for what?
Atom? Animal Cell? Plant Cell? Each have different structures.
Yes. They are aquatic animals.
Answer:
D. The bonds of a lipid molecule can only be broken by dissolving them in water
Explanation:
A Lipid can not be dissolved in a water solvent.