I think the answer is Cell M<span>embrane.</span>
Tundra - The coldest land biome is found near Earths north and south poles. It has no trees but has low, slow growing vegetation with permafrost below the topsoil. The tundra usually receives less than 25 cm of precipitation annually.
The primary roles done by these biological macromolecules in the biological processes in each organism is that contains substances that are considered as essential for these process and among which in macroscopic sizes are carbohydrates, lipids, proteins and many others.
