161. Lenticel is a loose mass of cells in cork tissue
meant for
a .Protection
b.Respiratory exchange of gases
c.Absorption of moisture from air
d.Exclusion of germs
164. Annual rings are the bands of
a Secondary cortex and cork
b. All secondary vascular tissue
Secondary xylem and xylem rays
d. Secondary phloem and medullary rays
165.Phellogen or cork camblum originates from
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Answer:
The given figure representing the lenticel.
The large sized, slightly raised sports or aerating pores present in the cork tissue are called Lenticels. These are found in old dicotyledonous stems. These are formed in the place of stomata. They have outer raised margins and internally, loosely arranged colourless parenchyma cells are present, called as complementary cells, These are meant for gaseous exchange.
So, the correct option is 'Structure of lenticel'.
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