Answer:
the main function of Krebs cycle is that it plays a big role in the process of energy production and biosynthesis.
The answer is sex cells or gametes
Simple Diffusion Across the Cell (Plasma) Membrane. The structure of the lipid bi-layer allows small, uncharged substances such as oxygen and carbon dioxide, and hydrophobic molecules such as lipids, to pass through the cell membrane, down their concentration gradient, by simple diffusion.
I’m pretty sure it’s D! Brainlyist ???