Are chemical messengers that are released by cells and transported in the bloodstream to alter the activities of specific cells in other tissues.

Drive down any three characteristic of modern periodic table

Aradio signal from a gps satellite take only about 0.067 seconds to reach a gps reciever. if the speed of light is about 300,000km/s, then approximately how far away is the reciever from from the satellite?

What is i fracture in the crust called when land move up, down or sideways