Answer Posted / anithaisro
The cyanobacteria were traditionally classified by
morphology into five sections. The first three -
Chroococcales, Pleurocapsales, and Oscillatoriales - are
not supported by phylogenetic studies. However, the latter
two - Nostocales and Stigonematales - are monophyletic, and
make up the heterocystous cyanobacteria.
The members of Chroococales are unicellular and usually
aggregate in colonies.
In Pleurocapsales, the cells have the ability to form
internal spores (baeocytes).
The rest of the sections include filamentous species.
In Oscillatoriales, the cells are uniseriately arranged and
do not form specialized cells (akinetes and heterocysts).
In Nostocales and Stigonematales the cells have the ability
to develop heterocysts in certain conditions.
Stigonematales, unlike Nostocales, includes species with
truly branched trichomes.
Is This Answer Correct ? | 4 Yes | 0 No |
Post New Answer View All Answers
what are the membranes does a water molecule pass between the soil and a vacuole in a mesophyll cell?
Does oxygen and hydrogen map up water?
Explain how does caffeine effect plant growth?
At what temperature should fresh sweet potato leaves be stored and dried?
What is the structure of chlorophyll and the energy transfer mechanism?
what are the recent ly discovrved economicimportance of fungi
How is double fertilisation present in some gymosperms when it is a characteristic of angiosperms?
What is the botanical name for the horizontal stems that allow a plant to spread underground?
What are the symptoms of early blight of potato
What is the damage powdery mildew do on plants?
Explain phelloids
TREE RINGS. Do they have any function other than dendochronology?
what is the role of auxins in floral bud development and fruit development?
what does prothallial cells do?
How to germinate Palms, specially Phoenix species?