Answer:
The correct answer will be option-D
Explanation:
Pulmonary Surfactant is a complex substance produced by the pneumocytes epithelial II cells in the alveolar sac.
The surfactant is composed of the proteins and lipids which plays a role in keeping alveoli open by reducing the surface tension formed between the air and liquid.
The surfactant act by forming a monolayer surface film which helps reduce the surface tension.
Thus, option-D is the correct answer.
Yes Actually! Meat is not technically meant to be digested! Hope this helps!
B. to make cellulose in the cell walls
If I'm not mistaking herbivores are primary consumers
Axon, dendrite
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