Answer:
Homology is similarity due to shared ancestry between a pair of organisms in different taxa. Both bats and humans have a common mammalian ancestor.
They diverged and adapted their arms for different functions.
Explanation:
Homologous features are physical features shared due to evolutionary history (a common ancestor).
The structure is calcium ions.
Answer:
Pneumonia is an infection of the lungs caused by bacteria virus fungi or protozoa in rare condition.
