It is the part of the digestive tract where approx 90% of the digestion and absorption of food occurs, the other 10% taking place in the stomach and large intestine. The main function of the small intestine is absorption of nutrients and minerals.That is, absorption of the nutrients and minerals in the food ingested, usually via the mouth, at an earlier stage in the digestive process.t is the part of the digestive tract where approx 90% of the digestion and absorption of food occurs, the other 10% taking place in the stomach and large intestine. The main function of the small intestine is absorption of nutrients and minerals.
Green seaweeds. Characteristics: Green colour from chlorophyll a and b in the same proportions as the 'higher' plants; beta-carotene (a yellow pigment); and various characteristic xanthophylls (yellowish or brownish pigments). Food reserves are starch, some fats or oils like higher plants.
Inside algae there are plant cells. And inside those plant cells there are organelles called chloroplasts. Chloroplasts make food for the algae so it can grow. What makes it â¦ green is chloroplasts have a green chemical in them. The chemical is called chlorophyll. It causes a chemical reaction with the suns energy and oxygen to create energy for the plant to use. 8 people found this useful.