Mutation is random because there is really no way of knowing whether a child will inherit it, whereas natural selection is predisposed in either parent.
The fetus does not use its lungs
1. Carbohydrates
(There are 3 sources of calories (or energy), which are also known as macronutrients: carbohydrates, protein, and fat.
Of these three, carbohydrates are the body’s preferred source of energy. Carbohydrates break down into glucose, which is an immediate source of energy.)
2.
A. Bone is not a type of human body tissue.
(The human body does has 4 types of tissue: Epithelial, muscle, connective and nervous tissue).
I'm not completely sure, but I'd say D.
