AP BIOLOGY

Detailed explanation-1: -Nonvascular plants, which include mosses, liverworts, and hornworts, lack a system for delivering nutrients inside their bodies. Vascular plants, which include most trees and flowering plants, have vascular vessels that transport water and food throughout the plant.

Detailed explanation-2: -Nonvascular plants (often referred to collectively as the bryophytes) include three groups: the mosses (Bryophyta), approximately 15, 000 species; liverworts (Hepaticophyta), approximately 7500 species; and hornworts (Anthocerophyta), approximately 250 species (Table 1).

Detailed explanation-3: -: lacking blood vessels or a vascular system.

Detailed explanation-4: -Characteristics of Nonvascular Plants They not only lack vascular tissues; they also lack true leaves, seeds, and flowers. Instead of roots, they have hair-like rhizoids to anchor them to the ground and to absorb water and minerals (see Figure below).