How does the ecological footprint of the united states compare with the world average ecological footprint?

Knowing the importance of the essential elements, why would someone chose a diet that does not address all of them?

Which of the following is true of metabolism in its entirety in all organisms? a) metabolism depends on a constant supply of energy from food. b) metabolism uses all of an organism's resources. c) metabolism consists of all the energy transformation reactions in an organism. d) metabolism manages the increase of entropy in an organism.

What is the next step in muscle contraction after the actin changes shape