Question

Arrange the following in descending order basing on their numbers.
(A) Number of central microtubules in a cilium
(B) Number of radial spokes in a flagellum
(C) Number of nuclei found in a mature sieve tube cell
(D) Number of peripherals microtubules in a flagellum

• A. D B C A
• B. D B A C
• C. C A B D
• D. A C D B

Answer 1

The correct option is B D B A C

The number of central microtubules in a cilium is two. There are nine radial spokes found in a flagellum. The sieve tube member is a mature phloem cell involved with long distance movement of food material. They are living cells but they lack a nucleus. In flagellum 9 peripheral doublet microtubules are found. So, the correct sequence is B.