What is the best description of a heterotroph? a) an organism that must "eat" food for energy b) cells that have nuclei c) a single-celled organism

How many orbitals does the p sub shell container

Which other elements contain the same number of outer electrons as sodium

Three cards with holes are arranged in a straight line. a light is shined through the first card’s hole and travels through all three cards. what does this tell you about light rays? a) that light is reflected b) that light is refractive c) that light travels in a straight line d) that light does not travel in a straight line