Why is glucose important to all life on Earth

Glucose is arguably the most important monosaccharide because it is used in respiration to provide energy for cells.

Explanation:

The energy stored in the bonds of glucose molecule is converted by a series of reactions into energy that is usable by cells.

hormones in blood stream

image: dtc.ucsf.edu

endocrine glands secrete hormones into the blood stream near them; the hormones then travel in our bloodstream until it reaches its destination, called a target cell, in distance parts of the body. in the target tissue, hormones lock onto the target’s plasma membrane, called the receptor site.

answer; polycythemia is the correct answer;