Which of the following statements correctly identifies and describes the type of covalent bond found between oxygen and hydrogen in water molecules?
hydrogen bonds because hydrogen is more electronegative than oxygen
O polar covalent bonds because oxygen is more electronegative than hydrogen
O polar covalent bonds because hydrogen is more electronegative than oxygen

O polar covalent bonds because oxygen is more electronegative than hydrogen

Explanation:

In the water molecule the two hydrogen atoms and one oxygen atoms forms the chemical structure in this the covalent bond is formed between hydrogen and oxygen and this is formed due to sharing of electrons between hydrogen and oxygen and oxygen being electronegative requires two electrons to complete its valency which are provided by two electrons each from one hydrogen and the O polar covalent bond is formed by this way.

a. decomposes use carbon from dead organisms as fuel for cellular respiration, returning carbon dioxide back into the atmosphere.

many other transport proteins, often called pumps, move materials against a concentration gradient. active transport drives molecules across a membrane from a region of lower concentration to a region of higher concentration. this process, shown in figure 5.1, uses transport proteins powered by chemi- cal energy.