Mendel studied "factors" that allowed for physical characteristics, which can have alternate versions, to be passed onto offspring. What are these factors called? ( I already know that it isn't traits fro my quiz)
1. plants
2. traits
3. alleles
4. phenotypes
PLEASE HURRY

Glass is transparent to visibile light under normal conditions; however, at extremely high intensities, glass will absorb most of the light incident upon it. this works through a process known as multiphoton absorption. in this process, several photons are absorbed at the same time. if very intense light whose photons carry 2ev of energy is shined onto a material with a band gap of 4ev, that light can be absorbed through two-photon absorption, because two photons have the right amount of energy to bridge the band gap. what is the minimum number of photons of 800-nm light that are needed to equal or exceed the band gap of fused silica glass