Answer:DNA has three types of chemical component: phosphate, a sugar called deoxyribose, and four nitrogenous bases—adenine, guanine, cytosine, and thymine. Two of the bases, adenine and guanine, have a double-ring structure characteristic of a type of chemical called a purine.
Explanation:
Think the answer is near watery fluid
The answer would be D: Veins generally transfer oxygen-depleted blood back to the heart; arteries generally transfer oxygen-rich blood away from the heart; capillaries provide blood to individual cells.