Which Gammaproteobacterial Genera Include Species That Oxidize H₂S to S⁰

question 17

Multiple Choice

Which gammaproteobacterial genera include species that oxidize H₂S to S⁰?

• A) Escherichia and Enterobacter
• B) Chromatium and Beggiatoa
• C) Klebsiella and Shigella
• D) Proteus and Erwinia
• E) none of the above

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Definitions:

Gonads

Gonads are the primary reproductive organs in males (testes) and females (ovaries) that produce sex cells (gametes) and sex hormones.

Testes

The male reproductive organs that produce sperm and testosterone, playing a key role in male fertility and secondary sexual characteristics.

Ovaries

Glandular organs in the female reproductive system responsible for producing eggs (ova) and sex hormones, including estrogen and progesterone.

Secondary Sex Characteristic

Features that appear at puberty, distinguishing the two sexes of a species but are not directly involved in reproduction.