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:
B. The mutations were beneficial for each new environment.
Explanation:
Chloroplasts are the tiny structures in plants cells where photosynthesis happen. chloroplasts contain chlorophyll , a green pigment that absorb light energy for photosnthesis
You can tell if matter is conserved if the substance changes . If the substance changes then matter has been conserved .
<u><em>My answer is that this statement is false.</em></u>
