Totipotent stem cells are best described as cells that can differentiate into any type of specialised cells found in organisms of that species.

Totipotent stem cells are best described as cells that can differentiate into any type of specialised cells found in organisms of that species.

• A. Stem cells that can differentiate into any type of specialised cells found in organisms of that species.
• B. Stem cells that can differentiate into almost all tissues and cells in the body.
• C. Stem cells that can become a limited number of tissue types.
• D. The ability to differentiate into a few tissue types.

Answer: (A)

Totipotent cells have the highest developmental potential: they can form every cell type needed to make a complete organism, including the extraembryonic tissues that support development (such as placenta). Saying they can differentiate into any type of specialised cells found in organisms of that species captures this all-encompassing potential, which is why this description fits totipotency best. To see why this stands out: other levels of potency describe more restricted options. A description of almost all tissues and cells in the body fits pluripotent cells, which can generate any embryonic cell type but not extraembryonic tissues. A statement about a limited number of tissue types corresponds to multipotent cells, which can become a subset of related cell types. A description focused on differentiation into only a few tissues points to oligopotent or unipotent cells, with the most limited options.

Totipotent cells have the highest developmental potential: they can form every cell type needed to make a complete organism, including the extraembryonic tissues that support development (such as placenta). Saying they can differentiate into any type of specialised cells found in organisms of that species captures this all-encompassing potential, which is why this description fits totipotency best.

To see why this stands out: other levels of potency describe more restricted options. A description of almost all tissues and cells in the body fits pluripotent cells, which can generate any embryonic cell type but not extraembryonic tissues. A statement about a limited number of tissue types corresponds to multipotent cells, which can become a subset of related cell types. A description focused on differentiation into only a few tissues points to oligopotent or unipotent cells, with the most limited options.