The sarcoplasmic reticulum wraps like a sleeve around the myofibril and stores and releases calcium a) true
b) false

for 8 am not sure maybe yes?

for 9 if it is asking if the male is more or less it would be less

hope i even just a little : )

answer: 45

explanationyou have to add as well to be it could be

igneous rocks are formed by solidification of cooled magma (molten rock), with or without crystallization, either below the surface as intrusive (plutonic) rocks or on the surface as extrusive (volcanic) rocks.  

the composition depends on the source magma. there are almost a thousand types of composition found till now.  

hope this