15 points answer fast! according to embryology, which three species have the closest common ancestor? a. insects, birds, and fish b. amphibians, mammals, and birds c. reptiles, amphibians, and bacteria d. insects, bacteria, and reptiles

Starting with only the balmer series light (visible light), how could we ensure that the solar panels generate a current that mark can use for his power station? a)by gradually increasing the brightness (amount) of light that we shine on it. b)by gradually increasing the frequency of the light we shine on it. c)by gradually increasing the wavelength of the light that we shine on it.

An initially unpolarized light if intensity 500 w/m^2 passes through four polarizers. the transmission axis between adjacent polarizers is 45∘. what percentage of the initial intensity is transmitted by the system?

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