<span>hromoplast is the generic term but is usually used to refer only to those plastids that do not have chlorophyll.</span>
<span>The answer would be: peripheral proteins anchored to the inner surface of their plasma membrane
Red blood cells have ankyrin and spectrin protein in their membrane that responsible for their biconcave shape. The shape itself is beneficial because it allows a larger surface area to accommodate gas exchange. It also allows the red blood cells to be squeezed into the narrow capillary blood vessels.</span>
It's oxygen.
Hope this helps,
-Starry<span />
