Heterotroph are consumers an organism that gets energy by eating other organisms. All animals are consumers. They must take in food because they cannot make their own.
Adenine always pairs with Thymine, and Cytosine always pairs up with Guanine in DNA. When dealing with RNA, however, Uracil replaces Thymine. So in RNA, A pairs with U and C pairs with G. (just a fun fact) :)
