The right answer for the question that is being asked and shown above is that: "b. Archaeopteryx fossils share traits with both birds and reptiles."
Nutrients cross the membrane wall with the help of protein channels.
Diffusion allows the exchange of substances; the entry of oxygen, proteins, etc into the cell and the removal of waste substances.
Humans can make a difference but carbon is everywhere. This generation has the largest carbon footprint yet.
