Answer:
50% or 1/2 in fraction form
<span>The correct answer is b.0.5 to 1 micrometre thick.</span>
Usually, the respiratory membrane is about 0.6 micrometres thick. This membrane consists of the alveolar epithelial cells, the capillary endothelial cell, and basement membranes which are formed by the alveolar and capillary cells.
The answers are A: It will not make enough food, and C: It will not convert enough CO2 into Glucose.