answer:
During prophase, the complex of DNA and proteins contained in the nucleus, known as chromatin, condenses. The chromatin coils and becomes increasingly compact, resulting in the formation of visible chromosomes. ... The replicated chromosomes have an X shape and are called sister chromatids
Explanation:
Lungs appear collapsed in the fetus because they are filled with amniotic fluid and they have never been inflated with air yet.
It tends to resist rising.