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.
I’m not sure but I think the answer is B or D
True, your legs are examples of levers.
Answer:
mitochondria serve as the power house of a cell.
The first action that the nurse should take is to BATHE THE NEONATE.
Typically, new born are bathe within two to four hours after their birth when their temperature have stabilized. But early or immediate bathing is recommended for the babies of HIV positive mothers in order to reduce blood exposure.
