The correct order for the layers of the gastrointestinal tract, from the inner most to the outermost is : from deep ( the lining of the lumen) to superficial (the external covering), these tunics are mucosa, the sub mucosa, the muscularis, and the adventitia or serosa.
The angiosperms produce modified leaves grouped into flowers that in turn develop fruits and seeds.
Plants provide oxygen for the planet and organisms, food/nutrients, and habitats for animals
The answer is A. To answer scientific questions accurately
