Gamma rays are the only part of the em spectrum that are not potentially hazardous to humans? true or false

Which of the following types of stars are dim but can have high surface temperatures? giants main sequence stars supergiants dwarfs

Consider the following reaction: 2h2 + o2 —> 2h2o a) what are the reactants in this reaction? b) what are the products in this reaction? c) how many molecules of oxygen are used in this reaction?

Do plant cells perform cellular respiration?