3. 1
Cyanobacteria role Profitable
• As a supplement. For example: Spirulina sp.
• Can perform photosynthetic. For example: Anabaena Azzolae
• Role is to add organic matter. Role as a producer for other
organisms.
• Cyanobacteria have an important role in the evolution and
ecology pathways that can alter the earth's history. Oxygen
contained in the atmosphere is produced by many cyanobacteria
during the Proterozoic era and Archaea.
4. A
• Cyanobacteria species Spirulina sp. (Arthrospira
maxima and Arthrospira platensis) is an
alternative protein source that can be used by
humans in the form of capsules, tablets, caplets,
syrups and powder supplements.
6. B
In nature, cyanobacteria are common in flooded rice fields. The
Cyanobacteria are photosynthetic and nitrogen fixation conduct that can
enhance rice growth and improve soil fertility.
7. C
• Cyanobacteria play a role in adding organic matter so that other
organisms can grow.
• Produce oxygen (by photosynthesis). For example: Chroococcus
sp.
• As a pioneer plant (capable of starting life before other
organisms can live)
8. D • Cyanobacteria play a role as a producer for other
organisms such as zooplankton, small fish, or shrimp
because of its ability to carry out photosynthesis.
However, population growth is too high Cyanobacteria
also not good because it leads to reduced dissolved
oxygen and sunlight can not get into the water.
9. 2
The Role of Adverse Cyanobacteria
• Some species of cyanobacteria produce neutrotoksin,
hepatotoxins, cytotoxins, and endotoxins, making them
dangerous for animals and humans.
• Some examples of harmful algae is blue and Anabaena flosaquae
Microcytis living things that causes death in the water. Blue
algae attached to the wall or stones can cause weathering.
10. • Cyanophyta are detrimental to humans is actually related to
human actions as well. Cyanophyta can live in an environment of
high levels of phosphate and nitrogen. Phosphate and nitrogen
levels are high on the aquatic environment is often caused by
industrial and agricultural pollution.
Accordingly the conditions that can lead to a proliferation of
Cyanophyta. Abundance of cyanobacteria can cover the surface of the
water so that sunlight and oxygen needed types of organisms in the
water is reduced and also can produce toxins.
Anabaena
Flosaquae
