What do mature red blood cells lack so that they can hold as much hemoglobin as possible?

Idont know but good luck; )

The conclusion is that the jellyfish like the clarinet the most and the but i don’t know 25

A  reaction  in which  energy  is  released  to the surroundings is called an exothermic  reaction. in this type of  reaction  the enthalpy, or stored  chemical energy, is lower for the products than the reactants. when ammonium nitrate is dissolved in water,  energyis  absorbed  and the water cools.