Avery long time, sometimes hundreds of years, to change a species
a) evolution
b) photosynthesis

your answer is A evolution because photosynthesis does not take several years to change, but evolution is a change in the genetic material that can take a long time.

there is no stairs in bungalow

explanation:

can i have brainliest i need one

the relative atomic mass of an element is the mass of one atom of that element, relative to 1/12th of the mass of a  1212c atom. to convert to an absolute mass in kg, it is necessary to multiply by  1.661×10−271.661×10−27.

the relative atomic mass is roughly equal to the number of neutrons, plus the number of protons, in the nucleus of the atom.

for elements with more than one stable isotope (different types of nucleus with different numbers of neutrons but the same number of protons), the quoted mass is usually the average mass, weighted by the relative abundance of the different isotopes.