The absence of chlorophyll, in the lowermost cell of Ulothrix, shows

Options

A. functional fission
B. tissue formation
C. cell characteristic
D. beginning of labour division

Answer

D

Explanation

(d) Ulothrix in an advanced alga, with three types of cells - green dome-shaped apical cell, green intercalary cell and basal non-green cell called holdfast. Holdfast or basal cell is for attachment, it has nucleus and cytoplasm, its presence shows the beginning of division of labour.