Lungs appear collapsed in the fetus because they are filled with amniotic fluid and they have never been inflated with air yet.
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:
Taxonomy is the science of naming and classifying organisms based on structural comparisons and genetic evidence.
Group 13-17 contains metalloids. Boron, Silicon germanium, Arsenic, Antimony, Tellurium and Polonium are considered metalloids. They have properties of both metal and non metal. Some of the element are good semi-conductors .
It is the presence of oxygen-bound hemoglobin that makes it bright red
