in our lungs
and throughout our blood stream
Answer:
sporopollenin
While the exine is composed of sporopollenin, a complex and highly resistant biopolymer containing fatty acids, phenylpropanoids, phenolics and carotenoids, the intine is largely composed of pectin and cellulose.
Explanation:
1. 25% which is bb
2. All living things are made of cells
3. Grams, mass
Hope that helps.
<span>The single most abundant chemical substance of the body, accounting for 60% to 80% of body weight, is "Water"
Hope this helps!</span>