Answer:
The key difference between monoembryonic and polyembryonic is the number of embryos that develop in a single seed. In a monoembryonic seed, only one embryo develops, while in a polyembryonic seed, multiple embryos develop.
Step-by-step explanation:
Monoembryonic is a term used in botany to describe seeds that produce a single embryo from fertilized egg (zygotic) found in majority of flowering plants. For instance, peach and walnut trees produce monoembryonic seeds.
Polyembryonic, on the other hand, refers to plants that produce seeds with several embryos. These additional embryos are not the result of different fertilizations. Rather, they come from the nucellus tissue, a part of the ovule. Citrus and mango trees, for example, produce polyembryonic seeds.
Thus, the key difference between monoembryonic and polyembryonic lies in the number of embryos developed within a single seed.