The correct answer is (a )
This experiment shows that the life has evolved from the inorganic materials. The substances like carbon dioxide, nitrogen gas when heated and exposed to UV radiation led to generation of life supporting element called as amino acids. The UV radiation and heat provided the energy needed by gases to convert into amino acids.
1. mother to fetus 2. through exposure to the antigen (virus, toxins, or cancer cells).
monosaccharides, disaccharides, polysaccharides
