Answer:
The pitch is the independent variable.
The dogs are the dependent variable.
Explanation:
An independent variable is something that you can control such as how high or low the pitch is. The dependent variable is the variable that is dependent on the independent variable. The dependent variable is the one that shows the results.
Answer:
Populations have variation in traits due to random mutation, crossing over and environmental conditions.
They help work together because when the heart pmps blood through the body and the cells flow through the blood non stop its like a barrier of protection
You improve your Your Muscular Indurance.
Hope this helps
