"<span>Eubacteria, Archaebacteria, Protista, and Plantae " is the one list among the following choices given that </span><span>contains all the possible kingdoms. The correct option among all the options that are given in the question is the first option or option "A". I hope that this answer has actually come to your help.</span>
I believe you are talking about Stem Cells.
Trophic cascades are interactions with much power that control an entire ecosystem when suppressed
I think Autorhythmic fibers are fibers that are self excitable or on their own for example some cardiac muscle. They repeatedly generate action potentials that trigger heart contractions.They continue to stimulate a heart to beat even when it is removed from the body. In comparison to contractile fibers, autorhythmic fibers are self excitable and do not require nervous system stimulation to trigger contractions. Contractile fibers have stable resting membrane potentials of -90mV, when a contractile fibers reaches threshold by action potential, the voltage gated fast sodium ions channels will open.
The skeletal system supports body structures; muscular system carries out the nerve commands to produce movement.
Hope this helps!
