Answer:
All cells are surrounded by a cell membrane. The cell membrane is semipermeable, allowing some substances to pass into the cell and blocking others.
Explanation:
Enzymes speed up the chemicaal reaction .
Scar tissue is made of a protein called collagen
Always be touching the horse so if you go behind the horse it won't be startled and try to kick. Also you need to be talking to it for the same reason
