<em>the correct option for this is B>></em>
Which Question do you need help with?
The answer is B. The cardiac, respiratory, and vasomotor
control centers are in the medulla. This means that the medulla controls heart
rate, blood pressure, breathing, and the size of the body's blood vessels. They
have chemoreceptors, pH sensing structures that detect levels of carbon dioxide in the blood and adjust the breathing rate accordingly.
There are four forces of evolution: mutation, gene flow, genetic drift, and natural selection.
