1aAntibiotics are produced by bacteria of this phylum cyanob

1a.Antibiotics are produced by bacteria of this phylum
   cyanobacteria
   actinobacteria
   firmicutes
   proteobacteria

1b.All archaea are extremophiles

   True
   False

1c.Photosynthesis in eukaryotes likely arose from engulfment of what type of bacteria?

   cyanobacteria
   actinobacteria
   firmicutes
   proteobacteria

Solution

1a. Antibiotics are produced by bacteria of this phylum actinobacteria.

Streptomyces is an example of actinobacteria from where streptomycin is produced.

1b.All archaea are extremophiles - False

Not all archaea are extremophiles, some are mesophiles too.

1c.Photosynthesis in eukaryotes likely arose from engulfment of cyanobacteria.

Cyanobacteria are prokaryotes that possess sac like thylakoids that perform photosynthesis.