Solar cells are used to a. photograph sunspots. b. convert sunlight into electricity. c. convert sunlight and carbon dioxide into sugars. d. convert electricity into solar energy.

i think the answer is a

Option A

Explanation:

The solar cells are used to convert the sun rays into electricity by exciting the electrons in the silicon cells using the sunlight.

The photons from the sunlight is beings used to generate energy which is used to generate the energy that can be used heat water, cook food et cetera.

The electricity produced is used to used in multiple way. This is a clean energy which can be used for various activities.

lunar landing mission. apollo 11 was the first manned mission to land on the moon. the first steps by humans on another planetary body were taken by neil armstrong and buzz aldrin on july 20, 1969. the astronauts also returned to earth the first samples from another planetary body.

explanation:

during the process of dna replication, brdu can replace thymidine and incorporate into the newly synthesized dna, cell proliferation thus can be reflected in the extent of brdu incorporation.