Question

which of the following correctly describes an example of a cell going through differentiation after receiving external information?
a cell in the head region of a fly egg inherits a cytoplasmic determinant from its mother and creates head proteins
a cell divides and each of the daughter cells receives genetic information
a cell in the dorsal part of a frog embryo receives a signal from another cell and turns into a neuron
a cell in the vegetal pole of the blastula elongates

Explanation:

Cell differentiation is the process by which a cell becomes specialized. In the given options, a cell in the dorsal part of a frog embryo receiving a signal from another cell and turning into a neuron shows a cell changing its fate based on external information. The first option is about inheritance of cytoplasmic determinants (internal - not external signal for differentiation), the second option is about cell - division and genetic information distribution, and the fourth option is just about cell - elongation without indicating differentiation based on external information.

Answer:

A cell in the dorsal part of a frog embryo receives a signal from another cell and turns into a neuron