Answer: Option A. -> Liver 
:
A

Liver is the largest gland in our body. It is located in the upper-right portion of the abdominal cavity. ​

Answer: Option B. -> ruminants
:
B
Ruminants are mammals that are able to acquire nutrients from plant-based food by fermenting it in a specialized stomach prior to digestion, principally through microbial actions. For example, cows and buffaloes. These animals have four bags to digest the food instead of one and they chew their food several times before sending it to the intestine.

Answer: Option B. -> Stomach
:
B
 $\bullet$ Stomach receives food from the food pipe. It is an important organ of the digestive tract. The major part of the digestion occurs here.
 $\bullet$ The liver is an organ shaped like a half-moon and is our body's largest solid organ. It is tilted in the body's cavity, with the left portion above the stomach.
 $\bullet$ The small intestine (small bowel) is about 20 feet long and about an inch in diameter. It's job is to absorb most of the nutrients from the food we eat and drink.
 $\bullet$ In human and most animals, the mouth is the first portion of the alimentary canal that receives food and produces saliva.

Answer: Option B. -> tongue
:
B
Tongue is a fleshy muscular organ in the mouth of a mammal. It helps in ingestion, chewing, and swallowing of food. It also helps in mixing of food with saliva, speech, etc. It contains taste buds which have receptors which helps in sensing the taste of the food being ingested. The taste buds in different parts of the tongue respond to sweet, sour, bitter, salty or umami taste.

Answer: Option A. -> cellulose
:
A

The cell wall of a plant is made up of cellulose. Cellulose is a long chain of linked sugar molecules.

Answer: Option A. -> cellulose
:

Similarity: 1 Mark
Difference: 1 Mark
Similarity: The mode of nutrition is holozoic, both in amoeba and human beings.
Difference: In amoeba, digestion is intra-cellular but in human beings digestion is extracellular.

Answer: Option A. -> cellulose
:

Egestion: 1 Mark
Difference: 1 Mark
The expulsion of undigested food from the gut through the anus is egestion.
Egestion is different from excretion because excretion involves the removal of any waste product that is generated in the body, while egestion is the removal of undigested waste material from the gut through the anus.

Answer: Option A. -> cellulose
:

Examples: 0.5 Mark each
Cows and goats are examples of ruminant animals.

Answer: Option A. -> cellulose
:

Functions of bile juice: 1 Mark each
1. Bile juice emulsifies fats and breaks them down into small particles. This is a detergent-like action of bile which helps the body to absorb the broken down fat products in the gut. In connection to this, bile salts bind with lipids to form micelles. This is then absorbed through the intestinal mucosa.
2. Bile juice helps in the absorption of fat-soluble vitamins.
3. Bile also serves as the route of excretion for bilirubin, a by-product formed during the destruction of red blood cells.

Answer: Option A. -> cellulose
:

Stomach specialty: 1 Mark
Digestion process: 1 Mark
Example: 1 Mark
The stomach of ruminant animals is special because it is four-chambered.
In their four-chambered stomach, cellulose is broken down by microorganisms in the rumen. A diverse group of microbes lives in the digestive system of ruminants.
A good example of a ruminant animal is the cow.