What type of bond holds the hydrogen atoms to the oxygen atoms in a water molecule? What type of bond holds an oxygen atom to a hydrogen atom?

they are held together by polar covalent bonds.

Explanation:

Water molecules are made of two hydrogen and one oxygen atom. Each hydrogen atom shares an electron with oxygen atom. When sharing electrons, a covalent bond is formed.

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.

because the light is a great source of energy for the plants to survive. (i hope this )