Name two animals which undergo external fertilisation and two animals which undergo internal fertilisation?

Q.

X and Y are the two types of animals. The animals like X undergo external fertilisation whereas animals like Y undergo internal fertilisation. The animals like X lay eggs from which baby animals are hatched. On the other hand, in animals like Y, the young one develops inside the uterus of mother which then gives birth to the baby.

(a) What is the general name of animals like X ?

(b) Give two examples of animals like X.

(c) What is the general name of animals like Y ?

(d) Write the names of two animals like Y.

Q. Name two animals in which external fertilisation takes place.

Q. Statement 1: Animals which undergo internal fertilisation are always viviparous.

Statement 2: Fertilisation which takes place inside the female body is called internal fertilisation.

Q. In which of the following animals, fertilisation is external?

Q. Development of the embryo takes place outside the female body in animals that undergo external fertilisation.