The figure below shows the Earth at two different positions in its orbit around the Sun. If Texas is in the Northern Hemisphere, which is the top half of the Earth, which position corresponds to summer in Texas?

#7 how does the structure of amino acids allow them to form a polypeptide? each amino acid has an amino group and a carboxyl group. each amino acid has a hydrogen atom and a carboxyl group. each amino acid has a carboxyl group and an r group. each amino acid has an r group and a hydrogen atom.