Question

7a) Plant physiologists attempted to produce papaya plants using tissue culture. They investigated the effects of different concentrations of two plant growth factors on small pieces of the stem tip from a papaya plant. Callus is a mass of undifferentiated plant cells. Plantlets are small plants. Explain the evidence from the table that cells from the stem tip are totipotent.

Answer 1

Cells from the stem tip are totipotent because they have the ability to differentiate into various cell types, as shown by the formation of callus and plantlets in the experiment.

Step-by-step explanation:

The evidence from the table that cells from the stem tip are totipotent is that different concentrations of plant growth factors resulted in the formation of callus and plantlets. Cells from the stem tip are totipotent because they have the ability to differentiate into various cell types, as shown by the formation of callus and plantlets in the experiment.

Callus is a mass of undifferentiated plant cells, which means that the cells have the potential to differentiate into various cell types. The formation of plantlets further demonstrates the totipotent nature of the stem tip cells, as they are able to grow into complete small plants.