Step 1: Understand genetic identity.
Plants that are genetically identical to the parent plant are produced through asexual or tissue culture methods.
Step 2: Define somaclones.
Somaclones are genetically identical plants produced through somatic cell culture techniques.
Step 3: Link with tissue culture.
These are produced via micropropagation from somatic cells in controlled laboratory conditions.
Step 4: Analyze incorrect options.
Twins are unrelated to plants, propagules are general reproductive units, and embryoids are embryo-like structures.
Step 5: Biological importance.
Somaclones ensure uniformity in agriculture and horticulture.
Step 6: Conclusion.
Hence, genetically identical plants are called somaclones.