Guard cells close up to prevent water loss. These guard
cells will automatically open up if there is a need of water to go out of the
cell. An open stomate allows water to leave through transpiration, guard cells
control the opening and closing of a stomata, stomates will close to reduce
water loss and By opening and closing the stomata on the underside of the
leaves.
Answer:
When it is cold higher up, the water molecules in water vapor come together; the water vapor becomes liquid water, which then falls as rain When the air gets to East Ferris, there is not enough water left in it to fall as rain. East Ferris people use too much water and do not recycle.
The alveoli are lined with mucus and are surrounded by a network of blood capillaries. They have very thin walls for gases to be absorbed through.Carbon dioxide diffuses from the blood into the alveoli.
