Which interactions is the molecular basis of muscle contraction?

Which list shows the levels of organization of an organism in hierarchical order from left to right, from the smallest to the most complex?

What is a universal way that predation benefits the predator? predation increases mate availability. predation in defense of space. the predator gets the energy it needs to survive. the predator keeps parasites from hurting the species.

An organism has the following traits multicellular cant photosynthesize has a skull. wht kingdom does this organism most likely belong too?