Outer core is the answer because mantle dissolved at one time
Answer:
Because photosynthesis is a source of oxygen, it seems intuitive that photosynthesis evolved first: once enough O2 was in the air, then respiration would be able to arise in the newly oxygen-enriched atmosphere. However, some biologists have argued since the 1970's that respiration in fact evolved first.
Reptile scales! Or, more specifically, reptiles descended from dinosaurs.
Answer:
some signs may include, high fever, coughing, fatigue, muscle aching, and diarrhea.
They are natural disasters.
