1) Explain how extracellular signals can create a fast, or slow response in cells and provide one example of each. 2) Which pathway(s) need to be altered in order to turn a normal cell into a cancer cell?

blue stars have the highest surface temp

stellar distances are usually expressed in light-years

the measure of a star's brightness is called magnitude

hope this !

im not in connections yet but i might can you some questions. what grade are you in?

a covalent bond, specfically triple bond

before, trains worked using the steam engine. thus, it uses heat so it is crucial to apply heat balance. the steam engine absorbs energy during the stage of boiling water. so, this is the endothermic reaction. when the steam is used to work the piston, it has to release this energy through running the train. the excess energy is released as an exhaust to the chimney. this is the exothermic process because it releases energy to the surroundings.