Question

Essential oils obtained from clove and sandal are

• A. Anitrogenous ergastic material
• B. Secretory ergastic material
• C. Nitrogenous ergastic material
• D. Only storage material

Answer 1

The correct option is A Anitrogenous ergastic material

Essential oils also sometimes called as 'ethereal oils', are a class of vegetable oils which are usually chemically complex mixtures of organic substances. In sandalwood, the heartwood is scented whereas the sapwood as well as the bark and leaves are not, the former being yellowish, deepening after exposure to the atmosphere. The oil chiefly consists of sesquiterpene alcohols (more than 90% of oil) - a mixture of two isomers $\alpha$ and $\beta$ santalols, the former being most abundant. The other constituents are santalal, santalone, santene and santalenes. The clove oil contains 80 to 92% eugenol, which is often employed for the manufacture of vanillin, another important flavoring substance. Clove oil is used in biology as a histological clearing agent.

So, the correct answer is 'Anitrogenous ergastic material'