B. Bacteria is a living prokaryotic cell.
Answer: A, all of them are organs!
Fan is electircal energy
Lamp's orignal energy source is electrical energy.
The energy originated from the animal when it was alive
<span>Since muscle contraction depends on interactions between actin, myosion and some intermediate molecules, the primary protein structure of such proteins and their spatial conformation are fundamental for their functioning. For example, actin and myosin, both filamentous proteins that slide past each other or troponin/tropomyosin interactions that blocks the binding of myosin to actin.</span>
