Answer:
here is four.
Explanation:
Warmth, moisture, pH levels and oxygen levels
<span>Topographic maps. It is a map that shows elevation of the earths surface by displaying it with distance between lines. Shorter distance from lines means it is steeper.
</span>
<span>Taking example on himself, Douglas states that education and environment are the factor for success, and that African-Americans are no more or less to be found possessing the right or wrong disposition as far as intelligence.</span>
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.
