Istudy prehistoric life through fossils and remains who am i

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

What processes take place before the mature mrna exits the nucleus?

Explain how paleontologists use trilobite fossils as index fossils for various geologic time periods.