Which layer of the alimentary canal is constructed from either stratified squamous or simple columnar epithelium? a) muscularis externab) mucosac) submucosad) serosa

It is it B because a mucosa         B.B.    

biology is the study of life. it is the study of living organism.

the most common energy conversion is from kinetic energy to potential energy, and then from potential energy to kinetic energy.

later on comes the heat energy, mechanical energy, and other energy conversions.

this energy conversion is so common that we can find it in our day to day lives as well.

- one of the most common energy conversions involves the changing of potential energy to kinetic energy or kinetic energy to potential energy