The answer is C, serve a different function.
In multicellular organisms, same types of cells makes up a tissue, and tissue makes up organs, then eventually organs work together as an organ system.
For example in humans, stomach cells makes up the stomach tissues, and stomach tissues makes up the stomach. stomach can help digest food and mix food molecules together. But in opposition, red blood cells is present in the blood tissue, however, their function is not to digest food, but is to transport oxygen.
Therefore, we can see that different cells serve a different function.
2) Stomata are flanked by them...
Transpiration is controlled by opening and closing of the stomata, which is accomplished through swelling or shrinking of guard cells.
I’m pretty sure it may be: ecology ?
An atom's outer energy level doesn't have the maximum number of electrons.
