Answer:
Somatic cells are the ones obtained by mitosis. They constitute the body tissues and have a variety of different functions. They are <em>diploid</em>, which means they have two copies of each chromosome (2n), one obtained from the father and one from the mother.
Gametes are obtained by meiosis. A diploid cell divides to form four <em>haploid </em>gametes, they have a single copy of each chromosome (n), obtained from the parent cell.
Zygotes are obtained by the fusion of two gametes, one from the father and one from the mother, they are <em>diploid </em>again having two copies of each chromosome.
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 especially for the brain and muscles.
The word cell comes from the Latin cellula, meaning, a small room. The descriptive name for the smallest living biological structure was chosen by Robert Hooke in a book he published in 1665 when he compared the cork cells he <span>saw through his microscope to the small rooms monks lived in.
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