endosperm tissue of angiosperms has what ploidy level
Endosperm About 70% of angiosperm species have endosperm cells that are polyploid.[4] These are typically triploid (containing three sets of chromosomes), but can vary widely from diploid (2n) to 15n.[5]
Meristem There are two types of apical meristem tissue: shoot apical meristem (SAM), which gives rise to organs like the leaves and flowers, and root apical meristem (RAM), which provides the meristematic cells for future root growth. SAM and RAM cells divide rapidly and are considered indeterminate, in that they do not possess any defined end status. In that sense, the meristematic cells are frequently compared to the stem cells in animals, which have an analogous behavior and function.