Question

Pits are formed on the cell wall is due to lack of

• A. cell plate
• B. primary wall material
• C. secondary wall material
• D. middle lamellum

Answer 1

Answer: (C)

Pits are formed on the cell wall is due to lack of secondary wall material. Pits appear circular, oval or angular in surface view and are of two types-simple and bordered. The simple pits are the areas with only primary wall without any secondary thickening and have uniform with of the pit chamber or cavity. The bordered pits are, however, more complicated as the secondary wall partially outgrows the pit to form a dome-shaped structure with a tiny perforation in the middle.