B. Mitochondria
The mitochondria is where ATP is made, hence why it is often called the "powerhouse" of the cell.
<span>This principle, or thought process, is that in basic sports fitness programs, all athletes training to continuously improve must always work harder an harder as their bodies become more used to their existing work out routines.</span>
1.Disease resistance of one plant.
<span>2. Food-producing capacity of another.
Hope this helps xD</span>
Tissue is the answer you are looking for