How are the areas of study – evolution and classification – interlinked? - Science

Short Note

How are the areas of study – evolution and classification – interlinked?

"Evolution and classification of organisms are interlinked." Give reasons to justify this statement.



Classification involves grouping of organisms into a formal system based on similarities in internal and external structure or evolutionary history. Two species are more closely related if they have more characteristics in common. And if two species are more closely related, then it means they have a more recent ancestor.

For example, in a family, a brother and sister are closely related and they have a recent common ancestor i.e., their parents. A brother and his cousin are also related but less than the sister and her brother. This is because the brother and his cousin have a common ancestor i.e., their grandparents in the second generation whereas the parents were from the first generation.

With subsequent generations, the variations make organisms more different than their ancestors. This discussion clearly proves that we classify organisms according to their resemblance which is similar to creating an evolutionary tree.

Concept: Evolution
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Chapter 9: Heredity and Evolution - Exercises [Page 159]


NCERT Science Class 10
Chapter 9 Heredity and Evolution
Exercises | Q 5 | Page 159

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Give the respective scientific terms used for studying the mechanism by which variations are created and inherited

Insects, octopus, planaria and vertebrates possess eyes. Can we group these animals together on the basis of eyes that they possess ? Justify your answer giving reason.

Write the contribution of Charles Darwin in the field of 'evolution.'

Explain how, characteristics (or traits) are inherited through genes.

Out of the wing of a bird, wing of an insect and the wing of a bat :
which two are homologous organs?

What is meant by acquired and inherited traits? Explain with one example each.

Explain the terms 'analogous organs' and 'homologous organs' with examples.

In what way are analogous organs evidence for evolution?

A population of red beetles lives in green bushes in a garden. Once during the process of breeding, a green beetle is produced.
(a) State whether the change in colour of beetle is a process of evolution or not.
(b) Can the new colour of green beetle be passed on to its next generations?
(c) What will be the advantage (if any) of the green colour to the beetle?
(d) State whether the production of green colour involved a change in genetic material or not.

Give one example each of characters that are inherited and the ones that are acquired in humans. Mention the difference between the inherited and the acquired characters.

Read the following statement and justify same in your own words with the help of suitable example.

Human evolution began approximately 7 crore years ago.

Read the following statements and justify same in your own words with the help of suitable examples.

Study of fossils is an important aspect of study of evolution.

Complete the statement by choosing correct options from below .

Evolution means -- -- -- --.

Write short notes based upon the information known to you.


Very short answer question.

Define Organic evolution.

Fill in the blank.
The first systematic explanation of the concept of evolution was given by _______________.

The chronological order of human evolution from early to recent stages is ______.

The first fossil of human form, discovered was ______.


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