Uncharged molecules and atoms are packed more efficiently in closed-packet structures. Hence theses uncharged molecules and atoms do not crystallize in simple cubic structures.
Complex organisms evolved from simple organisms, so simple organisms evolved first.
Organic molecules are molecules that have a carbon backbone.
complex
Simple diffusion really says it for itself. Mostly simple molecules and substances can pass through. Water, O2 or CO2, or other small simple molecules are the limited spectrum of simple diffusion.
respiration and microbial degradation of organic matter
They are covalent. Some are simple molecules, others are giant covalent structures.
Oxygen and nitrogen can as they are lipid soluble, as well as water molecules due to their small size.
It is very simple. Means uncharged and unformed rechargeable batteries are called Green plate batteries.
Complex organisms evolved from simple organisms, so simple organisms evolved first.
anabolism
leaflets
Organic molecules are molecules that have a carbon backbone.
complex
Ganglia are called simple brains in invertebrates .
Starches... Starches are large molecules made of small simple sugar molecules.
respiration and microbial degradation of organic matter
Simple diffusion really says it for itself. Mostly simple molecules and substances can pass through. Water, O2 or CO2, or other small simple molecules are the limited spectrum of simple diffusion.