The production of a whole organism from a cell by providing a suitable nutrient medium is called:

Correct answer: (b) Totipotency

Explanation

Totipotency is the ability of a single cell to divide and develop into a complete organism. In plant tissue culture, a small piece of tissue (an explant) is placed on a sterile nutrient medium with hormones. Its cells form a mass (callus) and then a whole new plant. Gottlieb Haberlandt proposed the idea in 1902.

• Apospory is the forming of a gametophyte directly from the cells of a sporophyte, without spores.
• Vegetative propagation grows new plants from parts such as stems, roots or leaves, not from a single cell.
• Pluripotent cells, such as some stem cells, can form many cell types but not a whole organism.