The principle of states that the physical, chemical, and biological processes at work shaping the earth today have also operated in the geologic past.

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

Which of these definitions have been paired with the correct type of cell?

The smallest biological units that can evolve are