Answer:
To stay inflated, the lungs rely on a vacuum inside the chest. The diaphragm is a sheet of muscle slung underneath the lungs. When we breathe, the diaphragm contracts and relaxes. This change in air pressure means that air is 'sucked' into the lungs on inhalation and 'pushed' out of the lungs on exhalation.Explanation: hope this helps
It’s see most of the interior of each cell is occupied
Answer:
C. Ss
Explanation:
One dominant allele (S) and one recessive allele (s) indicates a heterozygous trait.
It is useful for an ecologist to identify the keystone species in an ecosystem because the keystone species is important to maintaining the stability of an ecosystem, and any changes in the keystone species population shows that there is changes in ecosystem health.
It's B! Hope this helped let me know if it was! (: