Which organ system is similar to the function of a nucleus? A. Digestive system
B. Excretory system
C. Nervous system
D. Endocrine system

its the nervous system

Explanation:

because The smooth endoplasmic reticulum in the cell is similar to our endocrine system because The centriole in the cell is similar to our reproductive system

your answer is a. the enthalpy of formation for a pure element in its standard state is always positive.

> b takes place in the gas phase in an isothermal tubular reactor. the feed is one mole of a per one mole of c, an inert. the entering temperature and pressure are 427°c and 10 atm, respectively. the gas constant r = 0.08206 atm · l/mol · k.