51. Why are carbohydrates and fats considered high energy foods? (A) They have a lot of oxygen atoms. (B) They have no nitrogen in their makeup. (C) They can have very long carbon skeletons. (D) They have a lot of electrons associated with hydrogen.

2. Genetically engineered plants (A) are more difficult to engineer than animals. (B) include a transgenic rice plant that can help prevent are more difficult to engineer than animals t vitamin A deficiency. (C) are being rapidly developed, but traditional plant breeding programs are still the only method used to develop new plants. (D) are able to fix nitrogen themselves

51. Why are carbohydrates and fats considered high energy foods?
(A) They have a lot of oxygen atoms.
(B) They have no nitrogen in their makeup.
(C) They can have very long carbon skeletons.
(D) They have a lot of electrons associated with hydrogen.

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