Mosses are dependent on external water for sexual reproduction because

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Mosses require water for sexual reproduction because their sperm must swim through water to reach and fertilize eggs. Mosses release their sperm into water, where they swim toward the female structures, known as archegonia, which contain the eggs. This is necessary because mosses lack specialized structures for fertilization such as flowers, which use pollinators to transport pollen to the female reproductive structures. Without water, the sperm of mosses would not be able to reach the eggs and fertilize them.

Mosses Are Dependent on External Water for Sexual Reproduction Because