What does it mean when an emission line of helium from a galaxy is shifted toward red A. The galaxy contains a small percent of Hydrogen

B. The Galaxy is moving toward the viewer

C. The galaxy is moving away from the viewer

D. The galaxy contains a large percent of hydrogen

This is a situation in which genes are attached to an organism's sex chromosomes; the sex of an organism influences the expression of a gene.

The double bond between a carbon atom and two oxygen atoms (a molecule of carbon dioxide) has two characteristics. what are they? a. an ionic bond is formed between the oxygen and carbon atoms. b. four valence electrons are shared. c. two valence electrons are shared. d. valence electrons are shared between oxygen atoms.

Why does the earth spin slowly, not faster? is it possible to prove it scientifically? can you prove it with math?