Question

During development of embryo in angiosperms, the apical cell of the two-celled proembryo divides longitudinally and both the apical cell and basal cell take part in further development of embryo. This type of embryo is called as _____ type.

• A. Solanad
• B. Caryophyllad
• C. Asterad
• D. Chenopodiad

Hint:

Named after the family Caryophyllaceae, where both apical and basal cell derivatives build the embryo.

Answer 1

The Correct Option is B

Step 1: Angiosperm embryo development is grouped into types like Crucifer, Solanad, Asterad, Caryophyllad, Chenopodiad and Piperad, mainly separated by two things: which way the zygote's first wall runs, and how much the basal cell contributes afterward.

Step 2: The question describes a longitudinal first division of the apical cell, with the basal cell staying actively involved in embryo formation rather than being reduced to a simple suspensor filament.

That combination of features, a vertical split plus shared contribution from both cell lines, matches the Caryophyllad type of embryogeny.

Answer: Caryophyllad type.