14. Which substance is responsible for giving plants a green colour?
A
auxin
B.
chlorophyll
C
starch
D
sucrose

B.Chlorophyll

Explanation:

If your teacher has showed you a diagram of cells for both plants and animals you will know that B is the only one found in plant cells, and if defined in a dictionary or google, will be what changes the color of plants

blood enters the heart through two large veins, the inferior and superior vena cava, emptying oxygen-poor blood from the body into the right atrium of the heart. as the ventricle contracts, blood leaves the heart through the pulmonic valve, into the pulmonary artery and to the lungs where it is oxygenated.