karina says the change in the guppy population was caused by a mutation. miles says the change was caused by a change in the environment. zora thinks both karina and miles are correct. who do you think is right? explain what happened to the guppies over many generations?

It is a mixture. simply put, a compound must be pure, that is, of only one chemical structure and composition. a mixture is made of different chemical substances (i.e. elements, molecules, compounds) that are not chemically bonded to each other, but instead physically grouped together, as in the case of gasoline (a homogeneous solution).