Answer:
Mutualism
Explanation:
I dont remenber, but its true.
The correct substitutes would be " A. Ellos lo compraron
In English, Ellos compraron El Reloj Pulsera means : They (masculine) bought the watch
Reloj : Masculine singular Pronoun, which means that the objective pronoun should be : LO
Hope this helps
Adenine and thymine are complementary to one another as are guanine and cytosine. There are two important<span> reasons why </span>DNA<span> is composed of complementary</span>bases<span>. ... The second reason is that the </span>pairs<span> of </span>bases<span> are complementary because their chemical structure allows for strong hydrogen bonding and they fit together well.</span>