A. The basic unit of structure and function of plants and animals is the cell, which does not meet the meaning of the question;

B. A peach belongs to angiosperms and can be produced through photosynthesis Organic matter, and cattle need to feed on ready-made organic matter, which is consistent with the meaning of the question;

C. Both peaches and cattle have sexual reproduction. Sexual reproduction requires the combination of germ cells to form a fertilized egg, which develops from the fertilized egg. into a new individual, which does not conform to the meaning of the question;

D. The six major organs of plants are: roots, stems, leaves, flowers, fruits, and seeds, and the fruits of peach are reproductive organs, and the fruits of cattle are The heart is an organ and does not fit the meaning of the question.

So choose: B