What is the correct sequence that describes the excitation and contraction of a skeletal muscle fiber?

Environmental impacts on evolution : mastery test

What would happen if the krill were removed from the food web

During the day, plants produce by splitting water molecules in the light-dependent reactions of photosynthesis. at the same time, plants use cellular respiration to produce some of the needed by the light-independent reactions to make sugars. during the night, plants produce because takes place.