Unlike arteries, veins contain valves that ensure blood flows in only one direction. (Arteries don't require valves because pressure from the heart is so strong that blood is only able to flow in one direction.) Valves also help blood travel back to the heart against the force of gravity.
Answer:
True
Explanation:
Plants use the energy of the sun to change water and carbon dioxide into a sugar called glucose. Glucose is used by plants for energy and to make other substances like cellulose and starch.
Cloning does not harm the animal nor effect the surrounding. Except the clone itself. Plus its a new out look of new development to human as to help replicate organs or tissues to save lives or increase longer living.
Cohesion is the connection made between identical molecules while adhesion is the connection between different ones
I believe this is the cell wall
