MCQ
Membranous extensions in blue green algae are known as
- Aphytochrome
- ✓chromatophore
- Cmesosome
- Dpneumatophore
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$II.$ It comprises dead elements
$III.$ It comprises highly lignified cell wall
$IV.$ It is the peripheral part
$V.$ It is dark and tough
Which of the above property doesn't belongs to heart wood?