The polarity of a plant is established when
A) the zygote divides.
B) cotyledons form at the shoot end of the embryo.
C) the shoot-root axis is established in the embryo.
D) the primary root breaks through the seed coat.
E) the shoot first breaks through the soil into the light as the seed germinates.

Question

Quizplus · Accepted Answer

The polarity of a plant, which refers to the directional orientation of the shoot and root systems, is established early in development, specifically when the zygote, the fertilized egg cell, divides for the first time. This initial division sets the stage for the differentiation of the plant's tissues and organs along a specific axis.

The Polarity of a Plant Is Established When