Answer:
1) About 8.7 million.
2) They are being found everywhere.
Answer:
Humans cannot occupy the lowest levels.
Explanation:
The answer is B. Speed up chemical reactions. Hope this helps.
Alveoli walls are composed of Type 1 and Type 2 alveolar cells
Answer:
To find the volume of a rectangular object, measure the length, width and height. Multiply the length times the width and multiply the result by the height. The result is the volume. Give the result in cubic units, such as cubic centimeters.
