2and3 only are the defense
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.
this is true and false but mainly true because we make our own food but sometimes get food from other places.
Answer:
E
Explanation:
in 1960 if agricultural yields increase it is modified into genetic of crops
