Which hormone is responsible for the development of the male secondary sex characteristics? O estrogen
O progestin
O progesterone
testosterone

The answer is D on 2021 edge :)

Diagram of the evolution of land plants?

Suppose you could go back in time to interview henri becquerel on the day he discovered radioactivity. from his perspective, write an account of the discovery.

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?