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.
The answer is <span>Time is the independent variable, and the number of birds is the dependent variable. </span>
<span>An independent variable is variable that is not affected in the experiment. It is what experimenter controls. On the other side, a dependent variable is called dependent because it depends on the independent variables. It is what is affected during the experiment.
In Sam investigation, he controls time - he counts birds at 6 a.m. and 6 p.m. So, time is the independent variable. The number of birds is affected during the experiment, so it must be the dependent variable.
</span>
<span>a.
migrating waterfowl use flooded rice paddies on their travel routes
i took a test on it.
</span>
Answer:What evidence supports the hypothesis of interbreeding between Neanderthals and Homo sapiens? DNA analysis shows that about 2% of the genome of most modern humans came from Neanderthals.
Explanation:please give brainliest
