Propone dos menús, uno para ejemplificar una comida sana y equilibrada --que contenga todas estas sustancias en proporciones adequades-- y otro para ejemplificar una comida incompleto y desiquilibtrat. Justifica las propuestas.

Which of these is true of the cytoplasm of an unfertilized egg? a. it is an unevenly distributed mixture of mrna, proteins, organelles, and other substances. b. it does not contain substances that are important in directing development. c. these substances are supplied by the sperm. d. it does not contain substances that are important in directing development. e. development is directed solely by the surrounding cells. f. it is a homogeneous mixture of mrna, proteins, organelles, and other substances. g. it does not contain substances that are important in directing development. h. these substances are produced by the dna of the fertilized zygote.