18. True
19. False, since there is a variation of outcomes when breeding.
Answer:
2
Explanation:
the fossils are the evidence of evolution
In a chemical reaction, the atoms and molecules that interact with each other are called reactants. ... No new atoms are created, and no atoms are destroyed. In a chemical reaction, reactants contact each other, bonds between atoms in the reactants are broken, and atoms rearrange and form new bonds to make the products.