The integument is composed of 2 layers: the most superficial layer, the ,is composed of stratified
epithelial cells; and the layer deep to the epidermis, the
, is composed of
and,
connective tissue.

what have scientists found to be the most efficient and effective way to insert new sequences into an individual? a-scientists have created genetically altered foods that release dna during digestion. b-scientists use viruses to insert specific gene sequences. c-scientists irradiate genes so that they can be absorbed through the skin.

actually the answer is c

la transducción de señal ocurre cuando una molécula de señalización de fluido extracelular activa un receptor de superficie de la célula.