<span>The leaf exerts a force on the sidewalk; the sidewalk exerts a force on the leaf.</span>
Answer:
Sensory cells last approximately two weeks and are renewed frequently.
Explanation:
Answer:
sour, corrosive
Explanation:
An acid is a substance that donates hydrogen ions. Because of this, in an acidic solution there are more hydrogen ions than hydroxide ions. This means the more acidic a food is, the more hydrogen ions are available to trigger the sour taste receptors. A base is a substance that accepts hydrogen ions.
