What is one theory that has been proposed about the formation of the universe

Which statement is most likely megan’s conclusion? the hypothesis is supported because the most common blood type in the united states is ab+. the hypothesis is not supported because the most common blood type in the united states is o+.

The nervous system interacts with the endocrine system by a. using hormones as connections b. sending nerve impulses directly to glands c. using neuroendocrine cells as connections d. sending neurotransmitters directly to neurons

What element is able to combine with itself and hydrogen to form large molecules ?