Answer:
You can ask your teacher, or use the resources that they have provided for you. You can also use professional websites that your teacher would approve of.
Explanation:
The correct answer is (a )
This experiment shows that the life has evolved from the inorganic materials. The substances like carbon dioxide, nitrogen gas when heated and exposed to UV radiation led to generation of life supporting element called as amino acids. The UV radiation and heat provided the energy needed by gases to convert into amino acids.
Your correct answer would be A. Nervous system
Answer:
cellular respiration...that's breathing out of humans
and through human activities like burning of fossil fuels...
