Scientists rely on which of the following in order to classify animals?
a. embryological development patterns only
b. adult body plans only
c. embryological development patterns and adult body plans for all animals
d. embryological development patterns for invertebrates and adult plans for vertebrates

Why did rutherford say that bombarding atoms with particles was like "playing with marbles" what

Imagine you are introducing the lac operan and the trp operon to students who have never learned about it before. complete the table to compare the similarities and differences between the two operons

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.