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Embryology and Fossils

Which ones ar...

Question

Which ones are not analogous organs?

A

Wings of birds and wings of butterfly

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B

Eye of octopus and eye of mammals

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C

Flippers of penguins and flippers of dolphin

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D

Thorns of bougainvillea and tendril of cucurbita

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E

Tuberous root of sweet potato and stem tuber of potato

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Solution

The correct option is E Thorns of bougainvillea and tendril of cucurbita
Homologous organs are the organs which have similar structure and different function and have the same developmental origin.
Both the thorns of bougainvillea and tendrils of Cucurbita origin from the stem and are modified from the auxiliary buds but their functions are different. Hence they are homologous organs.
Hence Thorns of Bougainvillea and tendril of Cucurbita are not analogous organs.
So, the correct answer is 'Thorns of Bougainvillea and tendril of Cucurbita'.

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Similar questions

Q. (a) Differentiate between analogous and homologous structures.
(b) Select and write analogous structures from the list given:
(i) Wings of butterfly and birds
(ii) Vertebrate hearts
(iii) Tendrils of bougainvillea and Cucurbita
(iv) Tubers of sweet potato and potato.

Q. How many of the following develops as a result of divergent evolution i.e. the same structure developed along with different directions due to adaptation to different needs?

(a) Sweet potato and potato
(b) Thorn of Bougainvillea and tendril of Cucurbita
(c) Flippers of penguin and dolphin
(d) Wings of bat and flippers of the whale
(e) Eyes of octopus and mammals
(f) The sting of honey bee and scorpion

Q. (a) Select the homologous structures from the combinations given below:
(i) Forelimbs of whales and bats
(ii) Tuber of potato and sweet potato
(iii) Eyes of octopus and mammals
(iv) Thorns of Bougainvillea and tendrils of Cucurbita

Q. (a) Select the homologous structures from the combinations given below.
(i) Forelimbs of whales and bats
(ii) Tuber of potato and sweet potato
(iii) Eyes of octopus and mammals
(iv) Thorns of Bougainvillea and tendrils of Cucurbita
(b) State the kind of evolution they represent.

Q. Study the different conclusions drawn by students of a class on the basis of observations of preserved/available specimens of plants and animals.
I. Potato and sweet potato are analogous organs in plants.
II. Wings of insects and wings of birds are homologous organs in animals.
III. Wings of insects and wings of bats are analogous organs in animals.
IV. Thorns of citrus and tendrils of Cucurbita are analogous organs in plants.
The correct conclusions are

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