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प्रश्न
Read the following statement and justify the same in your own words with the help of a suitable example.
There is evidence of foetal science among chordates.
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उत्तर
- Early embryos of fish, amphibians, reptiles, birds, and mammals have very similar structures.
- As they continue to expand, they develop new patterns.
- The earliest commonality of vertebrate embryos demonstrates that all vertebrate classes shared a common ancestor during evolution.
- This is known as embryological evidence for vertebrate evolution.
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संबंधित प्रश्न
Explain with an example for the given, how the following provides evidence in favor of evolution in organisms:
Homologous organs
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
State a reason for the increased population of dark coloured moths coinciding with the loss of lichens (on tree barks) during industrialization period in England.
The forelimbs of a frog, a bird and a man show the same basic design (or basic structure) of bones. What name is given to such organs?
Out of bacteria, spider, fish and chimpanzee, which organism has a better body design in evolutionary terms? Give reason for your answer.
Wing of an insect and forelimb of a bird are :
(a) analogous organs
(b) analeptic organs
(c) homologous
(d) homophobic organs
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
Explain with suitable examples importance of anatomical evidence in evolution.
Complete the following chart:
Similarities in the initial stages indicate the _______ evidence.
Select vestigial organs from the following.
Select the correct statement.
Tendons and ligaments are examples of ______.
Appearance of antibiotic-resistant bacteria is an example of ______.
What were the characteristics of life forms that had been fossilised?
What are we referring to? When we say 'simple organisms' or 'complex organisms'.
The evolutionary story of moths in England during industrialisation reveals, that 'evolution is apparently reversible'. Clarify this statement.
Write down the difference between homologous and analogous organs.
Define the term:
Homologous organs
