Question

Which of the following statements are true about microbes?

• A. Most of the microbes can be observed through naked eyes.
• B. Blue-green algae were the first photosynthetic organisms on Earth.
• C. Penicillin is produced by fungi.
• D. Paramecium produces an antibiotic named streptomycin.

Answer 1

Answer: (B), (C)

Penicillin is produced by fungi.

All microbes except certain fungi cannot be seen or observed with the naked eye. They can only be observed using a microscope. Blue-green algae, also known as cyanobacteria, were the first photosynthetic organisms on Earth. Penicillin and streptomycin are antibiotics obtained from the fungus Penicillum and the bacterium Streptomyces respectively.