Question

in which stage of Arabidopsis Embryogenesis hypophysis first obserbed

1-octant
2-globular
3-dermatogen
4-transition

please give me the answer with explanation

Answer 1

Octant stage. These four cells then divide transversely to form an octant (Figure 9, 10). The transverse walls of these 4 cells divides the embryo in half along what is known as the O' line. This becomes a boundary between distinct domains of the embryo.

7. Globular stage. All cells then divide periclinally to form the first histologically distinct tissue, the protoderm (Figure 11a). This stage is called the globular or dermatogen stage. The three basic tissue systems (dermal, ground, and vascular) can be recognized at this point based on characteristic cell division patterns.