I NEED HELP ASAP PLEASE

Embryos of different species look very similar, which shows that the organisms share a ancestor.

If a reactant was removed, did the new equilibrium system shift to make more reactants or more products?

If you chip a tooth, most likely you will go to the dentist to have the missing material filled in. currently the material used to fill in teeth is a polymer that is flexible when put in, yet is hardened to the strength of a tooth after irradiation with blue light at a wavelength of 461 nm. what is the energy in joules for a photon of light at this wavelength?