Question

The plant material, which is widely used in the preparation of culture medium, is
A)Cycas Revoluta
B)Cocus Nucifera
C)Pinus Longifolia
D)Borassus Flabellifer

Answer 1

Hint: It is known as the "tree of life". It is the most useful tree in the world and provides food, fuel, cosmetics and medicines. From it, the inner flesh and the milk is extracted which forms the regular part of the diets of many people living in the tropical and subtropical region.

Complete answer
-For the maintenance and growth of plant cells, tissues, or organs, the plant tissue culture technique is very important. Plant tissue culture takes place under sterile conditions on a known composition of nutrient culture medium.
-This technique is used to produce clones of a plant and this method is known as micropropagation.
-In this method, in a specific nutrient medium- a plant tissue known as explant is inoculated and provided with the hormones like auxin, cytokinin, and gibberellins.
-Various natural plant extracts used as a supplement to the basal media for growing tissues like coconut milk, various fruit juices, casein hydrolysate, and yeast extract.
-In the endosperm of Coconut, cytokinin is present in a large amount, acts as a growth hormone.

Additional answer
-Cycas revoluta - It is one of a species of gymnosperm in the family Cycadaceae. It is native to the southern part of Japan including the Ryukyu Islands. There are various known usages of Cycas revoluta and it is one of the spices used for producing sago. It is also used as an ornamental plant
-Pinus Longifolia - It is native to the Himalayas and commonly known as chir pine or longleaf Indian pine. It is one of the species of pine. The pinewoods have significant uses in carpentry such as furniture, window frames, floors, and roofing, and the resin of some species is an important source of turpentine.
-Borassus flabellifer - It is native to native to the Indian subcontinent and Southeast Asia parts. It has various names at various places such as doub palm, palmyra palm, tala palm, toddy palm, wine palm.

So, the correct answer is, “Cocos Nucifera”.

Note:
-Scientific name of coconut is Cocos Nucifera and its water is used as a culture media and can also be used as a substitute for human blood plasma.
-Coconut is different from other fruits because a large quantity of clear liquid known as coconut water or coconut juice is present in their endosperm.