Question

B
A
(a) Heterocyst
Mucilaginous sheath
(b) Vegetative cell Mucilaginous sheath
(c) Trichomes
Cell wall
(d) Mucilaginous sheath Heterocyst
12. Select the correct statement regarding heterocysts.
(a) These are present in some filamentous cyanobact
such as Nostoc and Anabaena
(b) These cells are specialised to perform N2-fixation
(c) These cells contain enzyme nitrogenase
(d) All of these
Giuon figur ronrocontr the
structura​

Answer 1

Answer:

it's all of these ie, option d