Digested nutrients will be absorbed through which of the following layers of the alimentary canal and by which processes? a mucosa—enters blood vessels; serosa—absorbed by villi b muscle layer—enters blood vessels; serosa—absorbed by villi c submucosa—absorbed by villi; muscle layer—enters blood vessels d mucosa—absorbed by villi; submucosa—enters blood vessels

 D Mucosa—absorbed by villi; submucosa—enters blood vessels

To absorb the nutrient, the digestive tract will need an enzyme to break down the food. The food will be absorbed by villi, which located in the mucosa layer. After absorbed, the nutrient will be moved into submucosa where the blood vessels are abundant. The nutrient will be sent to the body using blood vessel network.

An autotrophic protist - they can perform photosynthesis and mainly consist of unicellular algae. they can be divided into number of systematic group according to the shape of their cell and the type of photosynthetic pigments they use.