The-Living-World Question 901
Question: Virusus usually infect the whole plant except the [CBSE PMT 1993; MH CET 2000]
Options:
A) Stem apex
B) Cortex
C) Pith
D) Phloem
Show Answer
Answer:
Correct Answer: A
Solution:
Because in apical tips of shoot apex, a few growth hormones like auxins are formed which check infection of viruses.