Embibe Experts Solutions for Chapter: Evolution and Adaptation, Exercise 1: West Bengal Board-2020

 Which are the vestigial organs present in the vertebral column and alimentary canal in the human body? Name one of each.

 Write in chronological sequence the names of four main fossil ancestors during the course of evolution of the horse.

Explain the process of Natural Selection as proposed by Darwin with the help of a suitable example. What are the roles of swim bladder in the aquatic adaptation of Rohu fish?

A good number of Tilapia fishes are released in a pond having only different indigenous fish species grown naturally. Think and write which types of the struggle for existence Tilapia fishes have to face in order to survive?

Prepare a list of roles air sacs of pigeons play to fly in the air?

• Structure and function
• Indicating the nature of evolution

With the help of arrow signs, show the major evolutionary events as occurred gradually after the origin of life.

Discuss the following three events as mentioned in the evolutionary theory of Darwin:

• Prodigality of production
• Origin of variation
• Natural selection

'Adaptation is the change of shape, physiological functions and behaviour of organism'-Justify the statement with the help of any two examples.