A CONSUMER gains its energy by eating something else.
When the muscle or the skeletal muscle cells undergo anaerobic respiration, they become painful and fatingued, it is now known to be caused by build up of lactate. The skeletal muscle will be painful and fatigued and the caused of it will be because by build up of lactate.
The correct answer would be the last one: "evolved from past organisms." This theory basically just states that all living organisms evolved from a single common ancestor. Hope this helped! :)
I think the answer would be a Because if the thumb is strait is dominant it wouldn't be curved so A
The endoplasmic reticulum aids in the production and movement of proteins and other materials through the cell.
