I'm really sure that the answer is B
It's <u>D) an increase in reaction speed</u>
:-)
<em>Brainliest?</em>
Explanation:
Whereas primary tissues allow for vertical growth, secondary tissues allow for lateral growth: they allow stems and roots to become wider. In roots, the formation of both secondary meristems involves the pericycle.
<span>I think it would be A.) Anemia, reducing the delivery of oxygen to the brain </span>
The greatest surface area for gas exchange is found in the Alveoli
