We breath oxygen because it is needed to burn fuel [ sugars and fatty acids] in our cells to produce energy. Oxygen is also brought into the lungs via breathing; where it is transported by red blood cells to the entire body to be used to produce energy. The food we eat gives us protein, sugars, vitamins etc. for energy
Answer:
False
Explanation:
This statement is false because knowledge is more like a way of getting at the truth.
A justified and true belief is necessary and sufficient for knowledge. In philosophy, the study of knowledge is called epistemology, and according to Plato and traditional definition, knowledge is "justified true belief."
Answer:
Mutations and sexual reproduction increase genetic variation in a population. Natural selection occurs when environmental pressures favor certain traits that are passed on to offspring. ... Individuals may mutate, but natural selection acts by shifting the characteristics of the population as a whole.
Explanation:
Nutrients and energy from the food (as well as water) we eat are absorbed in the intestines.