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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.
- Etiolation
- Chlorosis
- Phototropism
- Photoperiodism
Correct answer: Etiolation
Solution
Etiolation is the developmental response of plants grown with too little light, producing long weak stems, small leaves, and pale color. Chlorosis is the yellowing symptom, but the overall growth response described is etiolation.
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