Why is it better that the lungs are spongy rather than empty like a balloon?

Penelope studies how the structure and function of the nervous system is related to behavior. she is a psychologist

Amniocentesis is a process in which amniotic fluid is taken from the mother's womb to identify any genetic abnormalities in the fetus. how would the discovery of the human genome contribute to this process?

Which event would lead to primary succession of a forest?