Gravity is a force of attraction and friction is a force of opposing motion.
<u>Explanation:</u>
When an object is subjected to a push or a pull then it is called as force. The Newton is the unit of force and when all the forces that are acting on an object is integrated it gives to the Net force. When two objects contacts each other there exits friction. It is the force that is responsible in opposing the motion of the objects as they contact each other.
The force that is attractive and results in pulling of the objects is Gravity. The attraction that exists between two objects is because of the mass. The acceleration that is being induced in an object that is in movement with the gravitational force is called as acceleration due to gravity.
Explanation: Transpiration is the loss of water from the plant through evaporation at the leaf surface. It is the main driver of water movement in the xylem. Transpiration is caused by the evaporation of water at the leaf–atmosphere interface. Up to 90 percent of the water taken up by roots may be lost through transpiration as only a small amount of that water is used for growth and metabolism.
As substances like oxygen are non polar and are not dissolved in water they can diffuse through the cell membrane without the need of channel proteins whereas polar molecules would be repelled by the hydrophobic tails of the phospholipid bilayer an would need a channel protein
