The picture is identified as the negative coccus. Gram-negative bacteria are spread worldwide, in virtually all environments that support life. They are characterized by their cell envelopes, which are composed of a thin peptidoglycan cell wall sandwiched between an inner cytoplasmic cell membrane and a bacterial outer membrane. Medically relevant gram-negative cocci include the four types that cause a sexually transmitted disease Neisseria gonorrhoeae, meningitis (Neisseria meningitidis), and respiratory symptoms (Moraxella catarrhalis, Haemophilus influenzae). Solution The picture is identified as the negative coccus. Gram-negative bacteria are spread worldwide, in virtually all environments that support life. They are characterized by their cell envelopes, which are composed of a thin peptidoglycan cell wall sandwiched between an inner cytoplasmic cell membrane and a bacterial outer membrane. Medically relevant gram-negative cocci include the four types that cause a sexually transmitted disease Neisseria gonorrhoeae, meningitis (Neisseria meningitidis), and respiratory symptoms (Moraxella catarrhalis, Haemophilus influenzae)..