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.
Confidence votes 30. Most Algae are plants and as such will undergo photosynthesis in order to produce ATP which is needed for plant growth. Blue-Green Algae are not truly algae they are Prokaryote Cyanobacteria because their nucleus is not enclosed in the membrane (also undergo photosynthesis).onfidence votes 30. Most Algae are plants and as such will undergo photosynthesis in order to produce ATP which is needed for plant growth. Blue-Green Algae are not truly algae they are Prokaryote Cyanobacteria because their nucleus is not enclosed in the membrane (also undergo photosynthesis).