Cells in some filamentous cyanobacteria that are specialized for nitrogen fixation are called:
1. Phycobilisomes
2. Chromatophores
3. Grana
4. Heterocysts
The cyanobacteria are also referred to as
(1) protists
(2) golden algae
(3) slime moulds
(4) blue-green algae
Oxygenic photosynthesis occurs in
(1) Chromatium
(2) Oscillatoria
(3) Rhodospirillum
(4) Chlorobium
Identify the labelled part in the given figure and select the correct option.
A | B | |
1. | Heterocyst | Mucilaginous sheath |
2. | Mucilaginous sheath | Heterocyst |
3. | Heterocyst | Capsid |
4. | Pseudopodia | Mucilaginous sheath |
Heterocysts present in Nostoc is specialised for
(1) fragmentation
(2) nitrogen-fixation
(3) symbiotic relation
(4) food storage