Glucose level increase, insulin is secreted.
glucose level decrease, glucagon is secreted
The Answer is Quick energy.
The study of human interaction with the natural world over time is environmental history, emphasizing the active role that nature plays in influencing human affairs and vice versa. ... The first, nature itself and its change over time, includes human physical impact on the land, water, atmosphere, and biosphere of the Earth.
It is not possible for two species with the same niche to coexist. one species will eventually drive the other into extinction