2. a plane travels 550 miles/hour in 4 hours. how far did the plane travel?
a. 137miles b. 2,200 miles c. 475 miles
d. 3,000 miles

Describe the function of the endomembrane system? what organelles are involved?

Red light strikes a metal surface and electrons are ejected. if violet light is now used with a 10% greater intensity, what will happen to the ejection rate (number of ejected electrons per second) and the maximum energy of the electrons? a) greater ejection rate; same maximum energyb) same ejection rate; greater maximum energyc) greater ejection rate; greater maximum energyd) same ejection rate; same maximum energye) none of the above answers are correct

If the chemical properties of a substance remain unchanged and appearance or shape of a substance changes it is called a ?