Question

Which one of the following in birds indicates their reptilian ancestry?

Scales on their hindlimbs

Four-chambered heart

Two special chambers crop and gizzards in their digestive tract

Egg with a calcareous shell

Solution

Egg with a calcareous shell

The birds have evolved from reptiles. Both birds and reptiles lay eggs which are large and telo lecithal with thick hard calcareous shell le.cleiodic eggs.

Some More Questions From Evolution Chapter

Which group of organisms were responsible for appearance of free oxygen in the atmosphere of the primitive earth ?

What is meant by the term fossil ?

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Evolution

Which one of the following in birds indicates their reptilian ancestry?

Scales on their hindlimbs

Four-chambered heart

Two special chambers crop and gizzards in their digestive tract

Egg with a calcareous shell

Some More Questions From Evolution Chapter

Which group of organisms were responsible for appearance of free oxygen in the atmosphere of the primitive earth ?

What is meant by the term fossil ?

What is the type of evolution in which the same structure developed along different directions due to adaptations to different needs ?

Name the different eras of geologic time scale.

What is single step large mutation?

Consider a thorn in Bougainvillea and a tendril in cucurbita. Are these two organs homologous or analogous ? Give reason.

Give two examples that represent adaptive radiation.

Which theory attempts to explain to us the origin of universe?

Evolution is a discontinuous process. Is it correct ?

Give the three key factors of the modern concept of evolution.

Mock Test Series

NCERT Sample Papers

Entrance Exams Preparation

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For Daily Free Study Material Join wiredfaculty

Evolution

Which one of the following in birds indicates their reptilian ancestry? Scales on their hindlimbs Four-chambered heart Two special chambers crop and gizzards in their digestive tract Egg with a calcareous shell

Some More Questions From Evolution Chapter

Which group of organisms were responsible for appearance of free oxygen in the atmosphere of the primitive earth ?

What is meant by the term fossil ?

What is the type of evolution in which the same structure developed along different directions due to adaptations to different needs ?

Name the different eras of geologic time scale.

What is single step large mutation?

Consider a thorn in Bougainvillea and a tendril in cucurbita. Are these two organs homologous or analogous ? Give reason.

Give two examples that represent adaptive radiation.

Which theory attempts to explain to us the origin of universe?

Evolution is a discontinuous process. Is it correct ?

Give the three key factors of the modern concept of evolution.

Mock Test Series

NCERT Sample Papers

Entrance Exams Preparation

Which one of the following in birds indicates their reptilian ancestry?

Scales on their hindlimbs

Four-chambered heart

Two special chambers crop and gizzards in their digestive tract

Egg with a calcareous shell