Marine mammals live in the pelagic zone. The larger fish and mammals live there, like swordfish and whales.
<span>tubulin, the microtubule protein</span>
The presence of photosynthesizing algae.
True. A protein becomes functional only when it reaches its tertiary shape (3D). It is not necessary for the protein to reach the quaternary stage, but that is just a more complex functioning protein. It really is just two tertiary merged together. Example is red blood cells.
