Meloidegyne incognitia infects:
Answer & explanation
Correct answer: option 1
The correct answer is Option (1) → Roots of the tobacco plants
The nematode Meloidegyne incognitia is a parasite of the roots of tobacco. It cuts the yield greatly. Tobacco plants were protected from it by RNA interference (RNAi): the plant makes a double-stranded RNA that matches an mRNA of the nematode, and this silences that mRNA in the parasite.
(1) Roots of the tobacco plants — Correct. The nematode lives in and feeds on the roots.
(2) Stems of the tobacco plants — Incorrect. The nematode does not infect the stems.
(3) Leaves of the tobacco plants — Incorrect. The nematode does not infect the leaves.
(4) Fruits of the tobacco plants — Incorrect. The nematode does not infect the fruits.
NCERT Extract:
Biotechnological Applications in Agriculture – …
