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In mature Arabidopsis embryo, root apical meristem consists of cells derived from
Embryo and apical suspensor cell
Embryo only
Suspensor only
Hypophysis only
Answers (1)
In a mature Arabidopsis embryo, the root apical meristem consists of cells derived from both the embryo and the apical suspensor cell.
During the early stages of embryogenesis in Arabidopsis, the developing embryo is attached to the maternal tissue through a structure called the suspensor. The suspensor plays a role in providing nutrients and support to the developing embryo.
Within the suspensor, there is a specialized cell known as the apical suspensor cell. This cell gives rise to the root apical meristem, which is responsible for the formation of the root system in the mature plant. The root apical meristem consists of cells that continuously divide and differentiate, leading to the growth and development of the root.
Therefore, the cells in the root apical meristem of a mature Arabidopsis embryo are derived from both the embryo and the apical suspensor cell. The embryo proper contributes to the development of the root apical meristem, while the apical suspensor cell provides the initial cells for its formation.
Hence, the correct answer is option 1.
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