When and why is calcium ions released from the sarcoplasmic reticulum into the cytosol

Which statement correctly describes a way that mutations increase the likelihood that a species will survive in a changing environment

What maintain homeostasis when a persons internal body temperature is 97.5°f

What causes eclipses? check all that apply. earth's rotation on its axis moon's shadow covering the sun earth's shadow covering the moon earth's orbit and moon's orbit occasionally aligning the moon and sun's gravity pulling in the same direction