3. Autotrophs produce organic molecules. I think 4 is cellular respiration cannot occur without photosynthesis
The difference between them is that they are active in fighting infection.
Plasma cells are active in defense during the first exposure to invaders like viruses or bacteria producing antibodies. Memory cells last longer and make a copy of the invaders. This allows an extremely rapid defense later in case of a second exposure.
<span>It is called a substrate. </span>
