Plant Transport - Science Learning 7

What is diffusion?

Answer: Diffusion is a phenomenon of movement of particles from a region where they are in higher concentration to the region where they are in low concentration. Diffusion does not require energy.

What are enzymes?

Answer: Enzymes are biological catalysts which means that enzymes speed up the chemical reaction. They are made up of a special type of protein. Enezymes lower the rate of activation energy.

What is activation energy?

Answer: Activation energy is the energy required by each reactant of a chemical reaction in order to react with other reactants. Enzymes lower this energy.

How does water and mineral salts reach xylem vessels?

Answer: Between the xylem vessels and roots there is a huge cluster of cells. When the water and mineral salts enter the roots, they are carried by each cell through different processes. Water is carried by the process of osmosis and mineral salts are carried by the process of diffusion. Then finally water and mineral salts reach the xylem vessels.

Why is transpiration important?

Answer: Transpiration is a very important process in which water is lost. Water enters the roots and moves up the xylem vessel very quickly. So excess water has to be removed, this is where transpiration comes in.