AP BIOLOGY

Detailed explanation-1: -Many seedless plants reproduce directly by producing flagellated sperm to fertilize an ovule. Because the sperm is flagellated, it needs water in order to swim to the ovule, or else fertilization cannot take place. In seed plants, the plants use pollen grains and ovaries for reproduction.

Detailed explanation-2: -Plants need water as the nutrients responsible for their growth are water soluble. They require water for fundamental processes like germination and mineral nutrition as well as to compensate for what is lost due to transpiration.

Detailed explanation-3: -Ferns, algae, and bryophytes find water as an essential element for fertilisation to take place. Because they are in need of water for the movement of sperms, etc.

Detailed explanation-4: -Free water is essential for sexual reproduction in bryophytes, since it is water that carries the sperm to the egg.