If the inner lining of the air sacs neither thin nor highly vascularized, then it can be inferred that AIR SACS ARE CANNOT BE THE SITES OF GASEOUS EXCHANGE BETWEEN AIR AND BLOOD. Air sacs are generally lined with mucus and surrounded with blood capillaries.
In case of birds, air sacs play an important role in respiratory system.
Answer:
C. Bacteria
Explanation:
Above ANS is correct mark it as branlist answer
Gametes that are the same in size and shape. Having gametes of different size and shape. Usually oogamous organisms have eggs and sperm. The female gonad in animals.
<span>They do not possess any skeleton at al</span>
Plant cells have a rectangular shape and a cell wall, while animal cells have a circular shape and no cell wall
