How are fern sporophytes and moss sporophytes alike? How do the leaves of an embryo differ from the leaves of a mature plant?

The sporophyte of ferns is differentiated into true leaves, stem, and roots. In contrast, mosses lack true leaves, stem or roots. Ferns are vascular plants, but mosses are not. The main difference between mosses and ferns is the presence or absence of a vascular system. Cotyledons are the first leaves produced by plants. Cotyledons are not considered true leaves and are sometimes referred to as "seed leaves," because they are actually part of the seed or embryo of the plant. ... Most cotyledons look similarly nondescript, while the true leaves resemble the leaves of the mature plant.

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