Moss

Mosses are small flowerless plants that typically grow in dense green clumps or mats, often in damp or shady locations. The individual plants are usually composed of simple, one-cell thick leaves, attached to a stem that may be branched or unbranched and has only a limited role in conducting water and nutrients. Although some species have vascular tissue this is generally poorly developed and structurally different from similar tissue found in other plants. They do not have seeds and after fertilisation develop sporophytes (unbranched stalks topped with single capsules containing spores). They are typically 0.2–10 cm (0.1–3.9 in) tall, though some species are much larger, like Dawsonia, the tallest moss in the world, which can grow to 50 cm (20 in) in height.

Mosses are commonly confused with lichens, hornworts, and liverworts. Lichens may superficially look like mosses, and have common names that include the word "moss" (e.g., "reindeer moss" or "iceland moss"), but are not related to mosses. Mosses, hornworts, and liverworts are collectively called "bryophytes". Bryophytes share the property of having the haploid gametophyte generation as the dominant phase of the life cycle. This contrasts with the pattern in all "vascular" plants (seed plants and pteridophytes), where the diploid sporophyte generation is dominant.

Bernard Moss

Bernard Moss is a virologist at the National Institute of Allergy and Infectious Diseases, part of the United States National Institutes of Health. He is the Chief of the NIAID Laboratory of Viral Diseases and of the NIAID Genetic Engineering Section. He is well known for his work on poxviruses.

Career

Moss received his bachelor's degree in biology in 1957 from New York University, his M.D. in 1961 from the New York University School of Medicine, and his Ph.D. in biochemistry from the Massachusetts Institute of Technology. He joined NIAID in 1966 and became Chief of the Laboratory of Viral Diseases in 1984.

In addition to his NIAID position, Moss is an adjunct professor at George Washington University and the University of Maryland.

Awards and memberships

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