DENDROLOGY

Detailed explanation-1: -Seedless vascular plants reproduce through unicellular, haploid spores instead of seeds; the lightweight spores allow for easy dispersion in the wind. Seedless vascular plants require water for sperm motility during reproduction and, thus, are often found in moist environments.

Detailed explanation-2: -Seedless plants reproduce asexually by producing spores that later form gametophytes. The gametophytes reproduce sexually by producing sperms and eggs.

Detailed explanation-3: -Plants such as ferns and mosses are called nonflowering plants and produce spores instead of seeds. There is also another group called the Fungi, that include mushrooms, and these also reproduce by spores.