Question

Which one of the following is a source of rubber?
A. Cedrus deodara
B. Parthenium hysterophorus
C. Hevea brasiliensis
D. None of the above

Answer 1

Natural rubber is obtained from latex, a milklike liquid present in either the latex vessels (ducts) or within the cells of rubber-producing plants. Around 20,000 species of plants turn out latex, but only 2,500 species are found to contain rubber in their latex. We have to think about the plant which provides natural rubber.

Complete answer:
The major industrial supply of natural rubber latex is that the Amazonian rubber tree (Hevea brasiliensis), a member of the family {dicot family}, Euphorbiaceae. This species is most popular as a result of it growing well beneath cultivation.
Hevea brasiliensis is called the para rubber tree, sharing a tree or most ordinarily, the rubber tree, maybe tree happiness to the family Euphorbiaceae. It's the foremost economically necessary member of the rosid dicot genus. It's of major economic importance, as a result of the milklike latex extracted from the tree is the primary supply of natural rubber. H. brasiliensis may be a tall deciduous tree growing to a height of up to forty-three m (141ft) within the wild, however, cultivated trees are typically a lot smaller as a result of drain the latex restricts the expansion of the tree. The trunk is cylindrical and should have a swollen, bottle-shaped base. The bark is a few shades of brown, and also the inner bark oozes latex once broken. The leaves have three leaflets and are spirally organized. The inflorescence includes separate male and feminine flowers. The flowers are pungent, creamy-yellow, and don't have any petals. The fruit may be a capsule that contains three giant seeds; it opens explosively once ripe.
Thus, the right answer is choice C.

Note: Natural rubber, conjointly referred to as gum elastic, latex, Amazonian rubber, caucho, or gum elastic, as at first made, consists of polymers of the chemical compound isoprene, with minor impurities of different organic compounds, plus water. The Kingdom of Thailand and Indonesia are two of the leading rubber producers.