Ugh help

Why do german shepherds shed so much

Plants consume most of their carbon from a. the soil b. the water c. the roots d. the air

Pentane with molecular formula c5h12, exists in three isomeric forms. one shows linear carbon chains, another has one -ch3 groups present on the third carbon atom, and the third has two -ch3 groups present on the second carbon atom. what types of isomers are these? a. geometric isomers b. structural isomers c. halotropic isomers