the plant material which is widely used in the preparation of culture medium is called

1. cycas revoluta
2. cocos nucifera
3. pinus longifoila
4. borassus flabelifer

The correct answer is cocos nucifera.Thecoconut tree(Cocos nucifera), is a member of thefamilyArecaceae(palm family). It is the only accepted species in thegenus Cocos.The termcoconutcan refer to the entirecoconut palm, theseed, or the fruit, which, botanically, is adrupe, not anut. The spellingcocoanutis an archaic form of the word.The term is derived from 16th-century Portuguese and Spanishcoco, meaning "head" or "skull",from the three indentations on the coconut shell that resemble facial features.