Which of the following is incorrect about Cyanobacteria?
1. They are photoautotrophs
2. They lack heterocysts
3. They often form blooms in polluted water bodies
4. They have chlorophyll similar to green plants
Cells in some filamentous cynobacteria that are speciallized for nitrogen fixation are called:
1. Phycobilisomes
2. Chromatophores
3. Grana
4. Heterocysts
The specialised cells to fix atmospheric nitrogen is called as
1. Heterocyst
2. Heterocyte
3. Heterocoem
4. Heterolog
The cyanobacteria are also referred to as
(1) protists
(2) golden algae
(3) slime moulds
(4) blue-green algae
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 |
Heterocyst in blue-green algae
1. Lacks photosystem- I
2. Are specialised cells for photosynthesis
3. May perform reproduction
4. Performs nitrogen fixation in anaerobic condition
Cyanobacteria do not possess which feature?
(1) Unicellular
(2) Colonial or filamentous
(3) Form blooms in polluted water bodies
(4) Only marine algae
Find the incorrect match.
(1) Heterocyst-Archaebacteria
(2) Gelatinous sheath- BGA
(3) Methanogen- Biogas
(4) Chlorella- protista