which of the spheres interact in the formation of coal? check all that apply.
-atmosphere
-biosphere
-cryosphere
-geosphere
-hydrosphere

Although there are a limited number of amino acids many different types of proteins exist because..

Many kangaroo rats live in the sonoran desert of the southwestern united states. they have a variety of adaptations for living in the desert. under which circumstance would the kangaroo rats of the sonoran desert be most likely to develop new adaptations by natural selection?

Which codon is the code for the amino acid histidine (his)?