Melting ice caps and glaciers
A gamete of this organism will have half that number (50), the haploid number of 25 chromosomes.
I think it might be <em>natural disasters.</em>
The embryonic stem in a seed is the plumule.
it grows out of the hypocotyl, which that itself grows out of the radical, which is attached to the microphyl, feeds on the cotyledon, is fertilized by the endosperm, and is all protected by a hard seed coat :)
