Answer:
I think it's A) A protein substrate
vestigial limbs
vestigial limbs are the remnants from the development of any one organism's ancestors.
Humans, for one example, have no real need for an appendix now that we are no longer herbivores.
Look at a x-ray image of certain snakes and you can see the structural remains of feet.
Because his principles of geology explained how Earth was shaped by the same processes, earthquakes, volcanoes, etc, as they are today. Darwin used this principle to hypothesize his theory of evolution that species must have also changed over time by the same processes like fitness.
Honestly I'd say a biologist studying the liver in mice, would figure out a drug to help the liver metabolize drugs and detoxify chemicals. I'd think they would figure out a way to prolong life by increasing liver health, and help remove Bile buildups that can occur. Both in human and in mice.
Answer: The first law of thermodynamics establishes that energy cannot be created neither destroyed.
Explanation:
So the grasshopers eat the grass to gain energy and then the birds eat the grasshopers to gain energy as well so by doing that they are just passing the energy to one another to power muscles and other body parts which follows the laws of thermodynamics that energy is not created but transfered from one system to another.
Hope this helps ! -Enrique, Biology Major :)
