AP BIOLOGY

Detailed explanation-1: -Their flagellated sperm must swim through water to reach the egg. So mosses and liverworts are restricted to moist habitats.

Detailed explanation-2: -Mosses and liverworts are small, primitive, non-vascular plants. They lack the conductive tissue most plants use to transport water and nutrients. Instead, moisture is absorbed directly into cells by osmosis.

Detailed explanation-3: -Mosses are small and lack a tubular vascular system. They are non-vascular plants and absorb water. They depend on diffusion for the movement of water in and out of the plant. They require a moist environment for reproduction.

Detailed explanation-4: -All cells in a moss’ body need to have easy access to water from the environment. The second reason they need water is because their male reproductive cells can only survive by swimming in droplets of water.