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प्रश्न
How do we compute the age of a rock?
उत्तर
Age of rock is computed by radiocarbon dating, potassium-argon dating, uranium-lead dating and rubidium-strontium dating method.
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संबंधित प्रश्न
What are vestigial organs?
Study the following statements:-
I. Wings of birds and wings of bats are homologous organs.
II. Wings of birds and wings of insects are modified forelimbs.
III. Wings of birds and wings of insects are analogous organs.
IV. Wings of birds and forelimbs of horse are homologous organs.
The correct statements are
(A) I and II
(B) II and III
(C) III and IV
(D) I and IV
Can the wing of a butterfly and the wing of a bat be considered homologous organs? Why or why not?
The presence of which of the following types of organs in two animals indicates that they are not derived from a common ancestor?
(a) homologous organs
(b) excretory organs
(c) analogous organs
(d) reproductive organs
Write short notes based upon the information known to you.
Embryology
“Appearance of melanised moths post-industrialisation in England is a classic example of evolution by natural selection.” Explain.
Define fossil.
Explain any five types of evidence that support the theory of evolution.
Industrial melanism in England after 1850 is an excellent example of Natural selection. Explain how?
Complete the following conceptual picture:
