What type of rna is produced in the nucleus

Heat from earths interior and pressure from overlying rock transform the remains of marine sediments into

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