Epithelial cells with important transport functions such as absorption and secretion often bear on their free surfaces.

the eggs of the insects should be the first thing collected at the scene.

false

i believe it is "they are not used up by reactions" as the answer to your question, text me back if this is correct because i just learned this.

common management practices in dairy and poultry farming are: (i) proper shelter facilities and their regular cleaning. (ii) some basic hygienic conditions such as clean water, nutritious food, etc. (iii) animals are kept in spacious, airy, and ventilated place.