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E – Coli bacteria present in the intestine of man provide the Vital B – Complex Vitamins.

Liver and pancreatic juice make the internal condition of the intestine gradually to a basic or alkaline one.

1. The pyloric sphincter present at the end of the stomach releases small amounts of chyme into the small intestine.
2.  The small intestine is the longest part of the alimentary canal.
3. Bile juice from the liver and pancreatic juice from the pancreas releases into the small intestine.
4. Bile juice helps in converting fats into small globule like forms by a process called emulsification.
5.  Pancreatic juice contains trypsin and lipase for digesting proteins and fats respectively.
6. Taking food into the body is called ingestion.
7. Transport of the products of digestion from the intestine into the blood is called absorption.

1. Maximum absorption of food takes place by finger-like projections called villi in the small intestine.
2. The passage of undigested material from the body by the way of the anus is called defecation.
3.  Vomiting is the body’s method of throwing out unwanted or harmful substances from the stomach. 
4. Reverse peristaltic movements occur in the stomach and oesophagus during vomiting.
5. Indigestion is caused by stomach and duodenal ulcers.. 

The anterior part of small intestine is called the duodenum, the middle part is the jejunum and the posterior part is called the ileum.

Marasmus: This is a disease due to a deficiency of both proteins and calories.

A) Accumulation of water in the intercellular spaces

(D) All the above

D) 6CO₂ , C₆H₁₂O₆ ,6O₂

(A) Vitamin D

Answer is (C) Obesity

A) Purple sulphur bacteria

D) Carbohydrates

Answer is (D) A and B

(D) Vitamin D

Renin is the enzyme present only in children. It helps in curdling of milk.

1. Premolars and molars are used when we eat peas and banana. 

2. Their function is to chew and grind the seed and food material.

Four types of teeth are present in our mouth. They are incisors, canine, premolars and molars.

We get energy to do work from the food we eat.

We use ganji (boiled rice water) for conducting action of saliva in the digestive system.

Tongue is useful for mixing and pushing the food in between teeth and helps to push into oesophagus.

1. Plants are capable of surviving under a range of situations. 

2. They survive from very hot, dry and brightly lighted conditions to wet, humid and dimly lighted ones. 

3. The requirement of light and other factors varies from one plant to other.

For each molecule of carbohydrate formed, one molecule of water and one molecule of oxygen is also produced

Food in the form of a soft slimy substance where some proteins and carbohydrates have already been broken down is called chyme

Carbohydrates are stored in plants in the form of starch.

\(CO_2+2H_2\underset{chlorophyall}{\stackrel{light}{\longrightarrow}}CH_2O+O_2\)

C) C . B . Van Neil

If Mucin is absent in saliva, swallowing food Will be difficult 

Glossitis is caused due to the deficiency of B₂ 

B) Niacin – Pellagra

1. The first phase of photosynthesis is light reaction. It occurs in grana of the chloroplast. 

2. During this phase light-activated chlorophyll molecule splits water molecule intoHydrogen (H⁺) and Hydroxyl ions (OH^- ) 

3. This reaction is known as photolysis of water which means splitting by light (photo means light, lysis means breaking). This was discovered by Hill. Hence it is also called Hill’s reaction.

The Finger like projection of the Small intestine which absorbs the digested Food are called villi.

The pancreatic juice contains two enzymes are: 

1. Amylase : diverts Starch in to maltose 

2. Lipase : Converts fats in to simple fats

Defecation: The passage of undigested material from the body by the way of anus is called defecation.

Enzymes present in gastric Juice are: 

1. pepsin : convert proteins in to polypeptides 

2. Rennin : converts the soluble milk proteins insoluble curds.

1. Enzymes present in intestinal juice are Maltose – Converts Maltose in to glucose. 

2. Sucrose – Converts Cane sugar in to glucose 

3. Lactate – Converts Milk sugar in to glucose 

4. Peptidase – Converts Peptidase in to amino acids 

5. Lipase – Converts Fats in to fatty acids and glycerol

Bile juice is produced by the liver and it is stored the gall bladder. Bile juice emulsifies Fats.