Question

which of the following cell do not have nucleus in it . ( ) A)Mature sieve tube cells. B)WBC of rabbit. C)RBC of rabbit. D)leaf cells of jasmine.​

Answer 1

A cell that does not have a nucleus is a prokaryotic cell. It only has the genetic material(DNA) in it but no proper membrane bound nucleus. It does not even have any membrane bound organelle. So it only has ribosomes.

Answer 2

Answer:

a) Mature sieve tube cells do not have a nucleus.

Explanation:

• In plant cells, the nucleus is absent in the sieve tubes.
• Sieve tubes cells are conducting cells of the phloem and do not contain a nucleus and ribosomes.
• Sieve tube members do not have ribosomes or a nucleus and thus need companion cells to help them function as transport molecules.
• All the other cells, WBC of a rabbit, RBC of a rabbit and leaf cells of jasmine possess a nucleus.