Question

why do animals undergoing external fertilisation lay large number of eggs and sperms?
​

Answer 1

Answer:

Organisms that take part in such process produce large number of gametes because (i) In external fertilization, there is a great chance that the sperm and the eggs released by the organisms can be affected by factors present in the environment like dessication ,predators, etc.

Explanation:

Hope it. helps and wish you a Happy New year and enjoy your day.

Answer 2

Answer:  Animal undergoing external fertilization lay a large number of eggs and sperms because, most of the eggs and sperms get destroyed due to the adverse environmental conditions (like heavy rainfall, strom, extreme temperature etc.) and a few of them get eaten by the other animals.

Explanation: I think it will help you pls mark me as brainlist