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Evolution

Question

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Differentiate between analogous and homologous structures.

Solution

Analogous Organs	Homologous Organs
(i) Those organs which are structurally dissimilar but functionally similar are called analogous organs.	(i) Those organs, which are structurally similar but functional dissimilar are called homologous organs.
(ii)They lead to convergent evolution.	(ii) They lead to divergent evolution.
(iii) Eg. Wings of birds and insects.	Eg. Forelimbs of terrestrial vertebrates such as frog, lizard, bird, bat, horse, man.

Some More Questions From Evolution Chapter

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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.

Which other term can be used for natural selection ?

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