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aliphatic radical group attached to a main, straight chain or benzene ring structure.
lighting that comes from alongside the subject, creating contrast between lit and unlit sides of...
a perforated wall or part of a wall at the end of one of the individual cells making up a sieve...
thin-walled or slightly strengthened, elongated phloem cells that conduct food substances.
the first non-zero digit in a decimal fraction. It can appear before or after the decimal comma...
a letter that is not pronounced, e.g. gnome, knowledge.
horizontal sheet of dolerite rock that has cooled between the bedding planes of rock strata