In what organelles does photosynthesis take place?

What is the name for a substance formed in a chemical reaction

Explain how ancient whale fossils found in eqypt are believed to support the theory of evolution.

Lola needs to sign 6 invitations. using stopwatch that measures time to tenths of a second, it takes lola 5.3 seconds to sign her full name. going by the accuracy of the stopwatch, which is the most accurate determination for the number of minutes lola needs to sign all 96 invitations