Author Question: Hemoglobin is a red pigment that contains _______. It has the ability to bind oxygen to itself. ... (Read 45 times)

krzymel · **on:** Jun 25, 2018

Hemoglobin is a red pigment that contains _______. It has the ability to bind oxygen to itself.

a. hydrogen
b. iron
c. magnesium
d. vitamin D

Question 2

________ An allergy is an abnormal response or hypersensitivity to a substance that does not normally cause a reaction in most people.

Indicate whether the statement is true or false