How is the endocrine system related to the nervous system in terms of its regulatory activity?
For one, the endocrine system uses chemical signaling (hormones, produced by glands) while the nervous system uses electrical signaling (neural impulses). The signal transmission of the nervous system is fast because neurons are interconnected, but the functions are more short-lived.
Thymine has a methyl group and is better suited for the storage property of the DNA molecule as it is far more stable compared to Uracil. RNA contain Uracil instead of thymine so as to make differentiation of RNA molecule from DNA molecules easier.
