Question

explain internal fertilisation and internal development​

Answer 1

The process of the internal fertilization takes place inside the female body, and the offspring develops there only, while in external fertilization this process happens outside the body that is in the external aquatic environment. Internal fertilization is of three types – Oviparity; Viviparity; Ovoviviparity.

Answer 2

Internal Fertilization External Fertilization

What is means

Fusion of gametes within the body of the female Union of the gametes in an external environment(Water bodies)

Quantity of gametes released

Lesser is released and deposited inside the body of the female Multiple gametes(both male and female) released into the external environment

Gametes involved

Only male gametes are discharged into the female genital tract Both female and male gametes are discharged into the external surroundings

Site of further development

Inside the female body Outside the body

Types

Viviparity

Oviparity

Ovoviviparity

No types as such, external environment

Explanation: