What is the major disadvantage of external fertilisation in most aquatic organisms?

What is the major disadvantage of external fertilisation in most aquatic organisms?
  1. The offspring are extremely vulnerable to predators
  2. Difficulty in synchrony between the sexes
  3. High mortality rate of offspring
  4. All of the above

Solution

A major disadvantage of external fertilisation in most aquatic organisms is that the offspring are extremely vulnerable to predators threatening their survival up to adulthood.

Asked in: NCERT

Practice more Reproduction in Organisms questions on Aicharya