Answer:
Iconic Solution is my best answer
The alveoli are surrounded by tiny blood vessels, called capillaries carrying blood to and from the heart.
Ans These differences show that they belong to a same kind of species. But in science whales are categorized as mammal
Explanation:
Your answer is correct. Chitin provide the strength to insect exoskeletons. Cellulose is the strength for plant. Starch and glycogen are energy sources for life.