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प्रश्न
Define vestigial organs.
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उत्तर
Vestigial organs are degenerate organs that are inadequately developed and non-functional. They could be useful in certain related and unrelated species, as well as in ancestors.
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संबंधित प्रश्न
If you are asked to select a group of two vegetables, out of the following, having homologous structures which one would you select?
(a) Carrot and radish
(b) Potato and sweet potato
(c) Potato and tomato
(d) Lady finger and potato
Four students P, Q, R and S differently reported the following set of organs to be analogous :
P. Forelimb of a frog and forelimb of a lizard
Q. Forelimb of a bird and forelimb of a human
R. Wings of a parrot and wings of a butterfly
S. Wings of a bird and wings of a bat
The two students who have reported correctly are :
(A) P and Q
(B) Q and R
(C) R and S
(D) P and S
Enlist any four sequential evolutionary names of human ancestors.
Name the scientists who Discovered the fossil of Australopithecus
Name any two temporary embryonic structures in vertebrates which provide evidence for evolution.
Differentiate between analogous and homologous structures.
The presence of which of the following types of organs in two organisms indicates that they are derived from the same ancestor?
(a) analogous organs
(b) respiratory organs
(c) digestive organs
(d) homologous organs
One pair of organs in the following animals are not homologous. This is :
(a) forelimbs in humans and lizard
(b) forelimbs in lizard and frog
(c) wings in butterfly and bat
(d) wings in bat and bird
The wings of a housefly and the wings of a sparrow are an example of :
(a) analogous organs
(b) vestigial organs
(c) respiratory organs
(d) homologous organs
The most common types of fossils are ------------------------.
Draw a labelled diagram of T.S. of a leaf showing Kranz anatomy.
Explain any three molecular (genetic) evidences in favour of organic evolution.
Similarities in the initial stages indicate the _______ evidence.
Homologous organs and vestigial organs are examples of ______ type of evidence in evolution.
The bones of forelimbs of whale, bat, cheetah and man are similar in structure, because ______.
What were the characteristics of life forms that had been fossilised?
The evolutionary story of moths in England during industrialisation reveals, that 'evolution is apparently reversible'. Clarify this statement.
Define the term:
Homologous organs
Industrial melanism in England after 1850 is an excellent example of Natural selection. Explain how?
Pick the odd man out:
