Question

Flattened green stem of unlimited growth is known as

• A. Phylloclade
• B. Cladode
• C. Hooks
• D. Stem Thorns

Answer 1

The correct option is A Phylloclade

Phylloclades and cladodes are flattened, photosynthetic shoots, which are usually considered to be modified branches. The two terms are used either differently or interchangeably by different authors. Phyllocladus, a genus of conifer is named after these structures. Phylloclades/cladodes have been identified in fossils dating from as early as the Permian. By an alternative definition, cladodes are distinguished by their limited growth and that they involve only one or two internodes. By this definition, some of the most leaf-like structures are cladodes, rather than phylloclades. By that definition, Phyllanthus has phylloclades, but Ruscus and Asparagus have cladodes.

So, the correct answer is A.