Question

The pattern of organisation of cilia and flagella is:

• A. 9 + 0
• B. 9 + 1
• C. 9 + 2
• D. 9 + 3

Answer 1

The correct option is C 9 + 2

• In eukaryotes, the fibrils of cilia and flagella show a typical 9+2 arrangement showing peripheral 9 doublet and 2 central single fibers.
• Arrangement of fibrils is indicated in a given image. 9 doublets are arranged in a circular manner while 2 fibers present at the centre of flagella.
• The movement of all these fibers induces the movement of whole flagella or cilia.
• In writing it indicates as 9+2.
• Thus, option C is correct.