A closed system is a system that makes no physical or chemical exchanges with its environment. Of these systems provided as choices (tree, human, clock, car), only a clock does not make exchanges with the environment, except for energy.
Therefore, of that list, only a clock would be a closed system.
Hope that helped! =)
Turning amino acids into molecules that can be used in the Krebs cycle takes energy, which means that burning protein for fuel is not as efficient as burning carbohydrates. ... When amino acids are used as an energy source, it reduces the reserves of amino acids that are available for protein synthesis.
<h3>the correct answer is glucose</h3>
To find out if it's true or not
No!!
Size of a cell doesn't depend on size of an
organisms, Their number maybe different 'cause of size but their cell
would remain same.
Hope this helps!
