Phenol is a type of alcohol.

Proteins are known as 'body building foods'. Proteins are essential for growth as they are responsible for the repairing of cells and other body tissues.

Vitamins A and D are fat soluble vitamins.

This is the correct option. Fats give 2.25 times more energy than carbohydrates.

Scolex is the frontal segment of a tapeworm, having suckers or hooks for attaching to the host.

Small intestine  is the principal site of carbohydrate digestion. Pancreatic and intestinal juices present in the intestine have all the enzymes required for carbohydrate digestion.

Pepsin is secreted by gastric glands and hydrolyses protein into proteoses and peptones.

Bile juice creates the alkaline pH in intestine for the action of pancreatic lipase. Thus, enzymes work more effectively in the intestine.

Lysozyme is an anti-bacterial enzyme present in saliva which destroys bacteria.

Incisors are cutting and biting type of teeth.

Chyme is the thick, acidic and semi-fluid mass of partly digested food that is passed from the stomach to the duodenum.

Molars and premolars are chewing and grinding type of teeth.

Gastric lipase acts on fats in acidic medium of stomach and just initiates digestion.

In amoeba, food is taken in from pseudopodium. In hydra, food is taken in with the help of tentacles. Cockroach has special mouth parts for taking in food. Butterfly uses its feeding tubes to suck nectar from flowers.

In hydra, water enters and is expelled through the mouth as there is no anus