How can we say that fish

Question:

 How can we say that fish exhibits external fertilisation?

Solution:

Female fish lay eggs in water while male fish releases its sperms in water. Sperms swim and reach the eggs of fish, randomly due to water

currents.When a sperm comes in contact with the viable egg, nuclei of both the cell fuses to form a zygote. This process of fertilisation takes place in

water outside the female body, hence fertilisation is external in fishes.

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