Question

Identify A, B, C and D.
$\begin{array}{cc}\text{Column A}\to & \text{Column B}\\ \text{A}\to & \text{Hen}\\ \text{Vertebrate}\to & \text{B}\\ \text{Amphibian}\to & \text{C}\\ \text{D}\to & \text{Amoeba}\end{array}$

• A. A - Viviparous, B - Man, C - Fish, D - Multicellular
• B. A - Oviparous, B - Snail , C - Salamander, D - Unicellular
• C. A - Viviparous, B - Cockroach , C - Toad, D - Unicellular
• D. A - Oviparous, B - Fish, C - Salamander, D - Unicellular

Answer 1

The correct option is D A - Oviparous, B - Fish, C - Salamander, D - Unicellular

Animal classification is done on various parameters:
$\bullet$Based on the cellular structure animals are classified as unicellular and multicellular.
$\bullet$Based on the presence or absence of the vertebral column, animals are classified as vertebrates and invertebrates respectively.
$\bullet$Based on their habitat, they are classified into aquatic and terrestrial.
$\bullet$Based on the mode of reproduction, they are divided into oviparous and viviparous. $\begin{array}{cc}\text{Column A}\to & \text{Column B}\\ \text{Oviparous}\to & \text{Hen}\\ \text{Vertebrate}\to & \text{Fish}\\ \text{Amphibian}\to & \text{Salamander}\\ \text{Unicellular}\to & \text{Amoeba}\end{array}$