If a pair of Organisms are capable of producing fertile offspring in nature they must belong to the same species
Maybe they came from different groups or mixed semen
B. Decreasing the surface area of solid reactant;
Why? Collision theory suggests that the more opportunities for reactants to come into contact or "collide" with other reactants, the faster the reaction will take place. Hence, decreasing the surface area will decrease the probability of collisions between reactants thereby decreasing reaction rate.
