When moving upward on an energy pyramid from one level to the next, what happens to the usable energy in an ecosystem?

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

Explain why biological control methods are generally environmentally superior to chemical pest control methods.

In general, are there any major differences that you can see? explain