Answer:
For early earth, it was filled with loads of oxygen and could kill humans if they breathed the oxygen that was in the air about 100 million years ago. This massive amount of oxygen cause massive creatures like the dinosaurs to exist. Current earth has an atmosphere with not too much oxygen.
Explanation:
brainliest
Answer:
chemical bonds between atoms in reactants
<span>D) They are nonlobed, simple leaves and are attached oppositely on the branch.</span>
So other scientists can try the exact same experiment and see if they both got the same results.
