Hello i am new here:)

Question:- what is photosynthesis?​

Explain the significance of the increased cell specialization of the volvocine line

Ihave no idea how to solve these. plus there's another question that is 2) a 10 kilogram meteorite is collected in space and brought back to earth. it is composed of 1.25 kg of uranium-238 and 8.75 kg of lead-206. how many u-238 half lives have passed? what is the approximate age of the meteorite?

Name the organism that belongs to the kingdom protista.