Valence shell
The number of electrons in the outermost shell of a particular atom determines its reactivity, or tendency to form chemical bonds with other atoms. This outermost shell is known as the valence shell, and the electrons found in it are called valence electrons.
The answer would be letter a
The can survive fr a long period of time outside a persons body.
<span>I think you're looking for August Weismann who disproved the idea of inheritance of acquired traits from somatic cells (body cells). By doing so, he proved that inheritance only takes place by germ cells (gametes). </span>
C) DNA has double chains, deoxyribose sugar, and thymine while RNA has a single chain, ribose sugar, and uracil.