The medulla oblongata<span> helps regulate breathing, heart and blood vessel </span>function<span>, digestion, sneezing, and swallowing. </span>
The correct answer is option (d) They allow the exchange of gases between cells in the leaf and the external environment.
Stomata are the tiny openings present in the epidermis (outer layer of cells) of the leaf. They have a pore which is guarded by the guard cells which controls the opening and closing of the stomata. Air enters and exits through the stomata.
The main funtion of stomata is to facilitate the gaseous exchange. The gas exchange that occurs when the stomata are open helps in the process of photosynthesis. During photosynthesis, carbon dioxide is taken in from the atmosphere and oxygen is released as a by-product of photosynthesis. The glucose produced is converted into the starch and stored in the leaves.
Also, water vapour diffuses through the stomata into the atmosphere by a process called the transpiration.
Thus, stomata are the structures that are mainly involved in the gaseous exchange between the cells of the leaf and the atmosphere.
Answer:
The shape of the enzyme determines which chemical reaction it will speed up.May strain the bonds of the substrate or put chemical groups of the active site in the correct position to speed up the reaction.
Athletes need a lot of protein and it is unhealthy for a athlete to become vegetarian Bc they don’t have anything to burn off during the sport
