Chapter 30, Problem 20A

Summary Introduction

Introduction:

The mammals are the organism that carry the babies in their wombs and give birth to the young ones. In initial days, the young ones are fed by the milk produced in the mammary glands of these organism. The marsupials are the members of the class Mammalia that have pouches. In these pouches they carry their young ones. The marsupials are generally found in the Australian and American region.

Answer to Problem 20A

Correct answer:

Option (C).

Explanation of Solution

Explanation/justification for the correct answer:

Option (C) echidna. Echidnas are monotremes. The monotremes are the mammals, which do not give birth to the young ones, instead they lay eggs like other animals. Hence, the correct answer is option (C).

Explanation for incorrect answer:

Option (A) opossum. They are furry animals native to America, they belong to the group of marsupial mammals. Hence, it is an incorrect answer.

Option (B) kangaroo. The kangaroo is a typical example of marsupials. They carry their baby in small pouch in their abdomen. Hence, it is an incorrect answer.

Option (D) wallaby. The wallaby is similar to the small kangaroos and they also belong to the group of marsupial mammals. Hence, it is an incorrect answer.