How is it possible for every human being, including brothers and sisters, to be genetically unique? Explain your answer by discussing the role of chromosomes and genes

The oxidizing agent our bodies use to obtain energy from food is oxygen (from the air). if you breathe 15 times a minute (at rest), taking in and exhaling 0.5 l of air with each breath, what volume of air do you breathe each day? air is 21% oxygen by volume. what volume of oxygen do you breathe each day?

Why are some places regularly warmer or cooler than others in a given month

Evolution acts upon the population of organisms and not on each individual organism