D, light can travel in the air or a vacuum and the speed is constant whether the light source is stationary or moving.
A ruler will not be needed due to having a graduated cylinder which can help measure the volume of liquids
Answer:
During exercise, your heart typically beats faster so that more blood gets out to your body. Your heart can also increase its stroke volume by pumping more forcefully or increasing the amount of blood that fills the left ventricle before it pumps.
Explanation:
Answer:
to maintain access to food, shelter, and mates
Explanation:
Answer:
1. Before: carbon dioxide After: Oxygen
2. Oxygen
3. Chloroplast
