Question

(a)
23. Which of the following statements about animals that
utilize external fertilization is incorrect?
(a) They are divided equally between terrestrial and
aquatic species.
(b) Many produce large numbers of gametes to ensure
successful reproduction.
(c) The behaviours associated with mating are often
highly synchronized.
(d) The probability of any one egg being fertilized and
developing into an adult can be low.
(c)
30. Whic
11:​

Answer 1

Explanation:

the option B is incorrect

Answer 2

The statement which is incorrect among the given option is option a: They are divided equally between terrestrial and aquatic species.

• Option a is incorrect in the context of fertilization that takes place externally because for this fertilization the male and female gamete of animals must get fused.
• It requires medium water for the male and female gamete of animals to get fused or fertilized and turn into a zygote.
• As water is required as a medium they are mainly the aquatic species. Even the frogs which are amphibians the fertilization and formation of zygote cells occur inside the aquatic environments only.
• Option b is correct because gametes may not fuse easily, therefore these animals create a large number of reproductive cells, increasing the chances of reproduction.
• Also, their mating behavior is synced or coordinated so option c is also right.
• Option d is appropriate because the probability of fertilization occurring is very less.
• Hence, option a is incorrect.