Question

The function of the embryonal suspensor in angiosperm is to
A. Serve as a channel as H$_2$O
B. Push embryo deeper into the endosperm
C. Release growth hormone
D. Transfer nutrients from parent sporophyte to young embryo

Answer 1

Suspensor cells divide into 6-10 cells and form a filamentous structure. Filamentous suspensor that is the result of the division of the suspensor cell pushes the embryo towards the endosperm. Suspensor cells are present in angiosperm plants that are mostly dicots.

Complete answer: After double fertilization in plants, two structures form as a result of double fertilization known as a zygote and primary endosperm nucleus(PEN). Zygote of angiosperm divides into two unequal cells, the larger cell is known as the suspensor cell that presents and the smaller cell is known as embryonal cell or terminal cell that presents towards the antipodal region. So the suspensor is a larger cell that is present in angiosperms zygote. The suspensor cell undergoes transverse division forming a 6-10 called long filamentous structure. The first cell of the suspensor is large and called historian or vesicular cell. The last cell of the suspensor towards the embryo cell is hypophysis. It forms a radicle tip. Next to the suspensor cell embryonal cell is present when the suspension cell undergoes division it pushes the embryo towards the endosperm that is also a product of double fertilization. This function of the suspensor helps the embryo and endosperm to reach close to each other, so endosperm provides nourishment to the embryo easily and the embryo can develop further.
So, the correct answer is an option (B).

Note: Endosperm is produced when male gamete moves towards the two polar nuclei located in the central cell and fuses with them to produce a triploid primary endosperm nucleus(PEN). The endosperm is a product of triple fusion and develops from the central cell of the embryo sac.