How are tetrapod limbs and fish fins developmentally similar?

A) Both start out as buds bulging from body wall.
B) Hox genes are used to produce both phenotypes.
C) Both grow from ectodermal tissue when Hox gene expression ceases.
D) a and b
E) b and c

Hox Genes

A group of related genes that control the body plan of an embryo along the head-tail axis by specifying regions of identity.

Ectodermal Tissue

One of the three primary germ layers in the embryo of a multicellular organism, which gives rise to the skin and nervous system.

Body Wall

The outermost layer of an organism's body, protecting internal organs and systems from external threats or injuries.