Tardigrade
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Tardigrade
Question
Biology
In a plant organ which is covered by periderm and in which the stomata are absent, some gaseous exchange still takes place through
Q. In a plant organ which is covered by periderm and in which the stomata are absent, some gaseous exchange still takes place through
1531
193
AIIMS
AIIMS 2004
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A
aerenchyma
7%
B
trichomes
14%
C
pneumatophores
18%
D
lenticels
61%
Solution:
Mature stems of woody plants have a peripheral water proof tissue called cork (phellum). A number of scars found on the surface of cork known as lenticels. Lenticels allow the gaseous exchange between the atmosphere and living cells below the cork.