Advertisements
Advertisements
प्रश्न
Human tailbone is a vestigial organ. Explain.
Advertisements
उत्तर
The vestigial organ is the remains of a structure that was functional in some ancestors but is no longer functional in the organisms.
In humans, many vestigial structures show a relationship to other mammals including the primates. Ancestors of human were having well-developed tailbone as their adaptation was arboreal. But gradually humans got adapted to the terrestrial habitat. So, their human tailbone is reduced (vestigial).
APPEARS IN
संबंधित प्रश्न
Give two examples of vestigial organs in human beings and plants.
(a) Select the analogous structures from the combination given below:
(i) Forelimbs of whales and bats
(ii) Eyes of octopus and mammals
(iii) Tuber of sweet potato and potato
(iv) Tuber of Bougainvillea and tendrils of Cucurbita
(b) State the kind of evolution they represent
Write the similarity between the wing of a butterfly and the wing of a bat. What do you infer from the above with reference to evolution?
“Two areas of study namely 'evolution' and 'classification' are interlinked'. Justify this statement.
How analogy and homology considered as an evidence in support of evolution ?
Out of bacteria, spider, fish and chimpanzee, which organism has a better body design in evolutionary terms? Give reason for your answer.
Identify the following pairs as homologous and analogous organs:
(i) Sweet potato and potato
(ii) Eye of octopus and eye of mammals
(iii) Thorns of Bougainvillaea and tendrils of Cucurbits
(iv) Fore limbs of bat and whale
You have potato, carrot, radish, sweet potato, tomato and ginger bought from the market in your jute bag. Identify two vegetables to represent the correct homologous structures.
(A) Potato and tomato
(B) Carrot and tomato
(C) Potato and sweet potato
(D) Carrot and radish
_______ is a connecting link between Annelida and Arthropoda.
“Appearance of melanised moths post-industrialisation in England is a classic example of evolution by natural selection.” Explain.
With the help of diagrams, describe emasculation and bagging.
Define fossil.
Very short answer question:
What is vestigeal organ?
______ is a vestigial organ in human beings.
The degenerated and non-functional organs found in an organism are called ______.
Select the correct statement.
Palaeontological evidence for evolution refers to the ______.
The study of fossil evidence of evolution is called ______
Animal husbandry and plant breeding programmes are the examples of ______.
Industrial melanism in England after 1850 is an excellent example of Natural selection. Explain how?
