On Earth is born origin nova How did oxygen 18 indicate the presence of water early in Earth’s history?

Time ! for a smell to begin the process of registering in your brain, first you must a) inhale odor molecules into the nasal cavity b)transduce scent chemicals c)have a scent to inhale d)all answers can work

Which is a function of the central nervous system

The variation among individuals, on which natural selection acts