Final answer:
The assertion that 'Crown roots form before seminal roots' is incorrect. In monocot grasses, the primary root, or radicle, emerges first, followed by adventitious roots, also termed crown roots, which develop after the primary shoot.
Step-by-step explanation:
The statement 'Crown roots form before seminal roots' is false. In monocot grass, like the one described in Figure 32.21, the primary root or radicle emerges first during germination. This is followed by the primary shoot, or coleoptile, and then the adventitious roots, which are sometimes referred to as crown roots. These adventitious structures are produced by the 'crown' at the base of the stem or leaves. Unlike taproots, which are part of a system led by a dominant, primary root, adventitious roots contribute to a fibrous root system, often arising from the stem, rhizome, or stolons, rather than the embryonic root.