An in-breath is that you are breathing in Oxygen. And and out-breath you are breathing out Carbon Dioxide
An electron is transferred from an electron to the other
They could need fresh water because some plants can't live in water but some of those plants are mangrove trees and other ?
One of the most common cause of hypersecretion of the endocrine glands would be tumors. Specifically, the presence a hormone secreting endocrine-cell tumor. Hypersecretion is when the gland is secreting too much of a hormone. Hope this helps.
