Which science is the study of living organisms? physics astronomy chemistry biology

How many moles of magnesium is 3.01 x10^22 atoms of magnesium?

Some animals that try to adapt to climate changes eventually die due to starvation, as climate change alters the web.

Which theory was contradicted by experiments with the photoelectric effect? light spreads out after it passes through a small opening. as soon as light strikes metal, electrons will be ejected. visible light, regardless of color, will cause the ejection of electrons when striking metal. the kinetic energy of ejected electrons depends on the frequency of light that strikes the metal.