The geological features were different. And humans development was different.
Answer:
Steroid; is a component of eukaryotic membranes.
Explanation:
Cholesterol is one of the most important chemical synthesized by all the animals. The chemical formula of cholesterol is C27H46O. The cholesterol in solid state was first given by C27H46O.
Cholesterol is present in the plasma membrane and maintain its membrane fluidity. Cholesterol is an important structure of the plasma membrane and acts as a pre cursor for various hormone. The cholesterol is a type of sterol and a lipid.
Thus, the correct answer is option (1).
Controlled burning? I think that's right.
Not quite sure but would say Archaebacteria with the most confidence... hope this helps good luck