Justify the claim that photosynthetic organisms that live less than 25 feet below the surface of the ocean need allophycocyanin to survive. Provide reasoning that explains this claim

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