alleryStart learning →Which part of plants respires most actively?
AMature woody stems of trees
BGrowing root and shoot tips
CDead xylem vessels in old wood
DCork tissue of the outer bark
Answer & Solution
Correct answer: B. Growing root and shoot tips
1. Cells that divide and grow need lots of ATP.
2. The chapter notes that meristematic regions like root and shoot tips respire fastest.
3. Dead tissues respire negligibly.
4. So option A is correct.
_Source: Selina Concise Biology Class 9, Ch 7 Respiration in Plants (Mistral OCR'd PDF), section on respiratory rate_
Keep practising Respiration in Plants
Browse all Respiration in Plants questions for ICSE Class 9, or explore more Biology topics.