Macromolecules provide structural support, a source of stored fuel, the ability to store and retrieve genetic information, and the ability to speed biochemical reactions , hope this helps :)
<span>The geologic time scale is divided into periods, which are then divided into epochs, which are further divided into ages. For example, the time of the dinosaurs lasted 3 periods (Triassic, Jurassic, Cretaceous), each period had 3 epochs (late, early, middle), and each age fit into one of those. Many epochs have more than 1 age associated with them.
As for the basis for differentiating the eras, I'm not so sure. The only one I can say for sure is the end of the Cretaceous, which is when the dinosaurs suddenly became extinct due to a meteor impact. I think the divisions are based on significant, global-scale events that changed the world.
Sorry its so long but that the answer i think >:) ur welcome
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As the cells multiply they get slower
The blood pressure in the arteries are fast paced so the arteries would need to be strong in order to manage while the blood pressure in the vains are much slower so the are not really strong builded
hope this helped
Science
This is true because humans can only know so much due to unexplored lands, water depth, and evidence of extinction being hidden.
