Mineral Nutrition Question 30
30. Which of the following is not caused by deficiency of mineral nutrition?
[1997]
(a) Necrosis
(b) Chlorosis
(c) Etiolation
(d) Shortening of internodes
Show Answer
Answer : c
Hints & Solution
(c) Etiolation is the response of a plant to stimuli. When plant seeds are grown in insufficient light, (either in partial or complete absence of light) the seedlings will have long, weak stems, smaller and fewer leaves because of longer internodes, and a pale yellow colour (chlorosis). This is due to a lack of chlorophyll. The increase in height helps the plant reach a possible source of light faster.
