In mitochondria, during cellular respiration
Hyperkeratosis is amy lesion with overgrowth and thickening of the skin, such as warts, calluses, and corns.
Answer:
Guard cells
Explanation:
Guard cells are the cells that are found around the openings of the stomata, their functions is that they regulate the opening and closing of the stomata. These cells are always fill with latex which is of high percentage of water, therefore when the intake of water is low, the functionality of the cells will be affected.
And it must be noted that, the stomata is very important in the exchange of gases, that is a process where oxygen is released and carbon dioxide is absorbed. Therefore when the cells are affected, the gas exchange will also be effected.
The homo sapiens appeared after two million years ago.Some of them spread from Africa into Asia and Europe.
