Rubber production involves several plant species, each contributing to different types of natural rubber. Detailed Analysis of Each Option:
(A) Para rubber from {Hevea brasiliensis:} Correct. {Hevea brasiliensis} is the primary source of natural rubber, commonly known as Para rubber. It is native to South America but extensively cultivated in Southeast Asia.
(B) India rubber from {Ficus elastica:} Correct. {Ficus elastica}, also known as the rubber fig, is traditionally used to produce India rubber, although it is not a major commercial source compared to {Hevea brasiliensis}.
(C) Panama rubber from {Manihot glaziovii:} Incorrect. Panama rubber is traditionally associated with species like {Castilla elastica}, not {Manihot glaziovii}. {Manihot glaziovii}, or Ceara rubber, is another species used for rubber production but is not the same as Panama rubber.
(D) Ceara rubber from {Castilla elastica:} Incorrect. Ceara rubber is actually produced from {Manihot glaziovii}, not {Castilla elastica}, which is associated with Panama rubber. Conclusion:
Explanation: Understanding the correct botanical sources of rubber is essential for the accurate classification of rubber types and their respective plant origins. This knowledge is vital in agricultural practices and the rubber production industry.
The \( F_{121} \) value of a known microorganism with \( Z \) value of \( 11^\circ C \) is 2.4 min for 99.9999% inactivation. For a 12D inactivation of the said microorganism at \( 143^\circ C \), the \( F \) value (in min) is .......... (rounded off to 3 decimal places)
Three villages P, Q, and R are located in such a way that the distance PQ = 13 km, QR = 14 km, and RP = 15 km, as shown in the figure. A straight road joins Q and R. It is proposed to connect P to this road QR by constructing another road. What is the minimum possible length (in km) of this connecting road?
Note: The figure shown is representative.
For the clock shown in the figure, if
O = O Q S Z P R T, and
X = X Z P W Y O Q,
then which one among the given options is most appropriate for P?