Question

Choose the right option for correct statement.

(A) azosprilium and azotobacter are free living

(B) rhizobium is the best example of cyanobacteria.

(C) baculoviruses attack bacteria.

(D) genus glomus is placed in a bacteria group.​

Answer 1

(A) azosprilium and azotobacter are free living

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Answer 2

• Azospirillum is a free-living nitrogen-fixing bacteria. They are gram-negative bacteria. Similarly, Azotobacter is a free-living nitrogen-fixing bacteria.
• Cyanobacteria are also known as blue-green algae. They are a group of photosynthetic bacteria. Some examples include Nostoc, Anabaena, Oscillatoria, etc.
• Baculoviruses are commonly used as a bio-control agent. They attack pathogens which include insects and other arthropods.
• Genus glomus is placed in the fungi group. They are arbuscular mycorrhizal fungi. They show a symbiotic relationship.

Hence, the right option for the correct statement is option (A) Azospirillum and Azotobacter are free living.