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प्रश्न
Write a short note:
Embryological evidences
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उत्तर
- Embryological evidences arise from comparative study of embryological developmental stages of various vertebrates.
- Embryos of different vertebrates appear similar during the initial stages of development and these similarities gradually decrease as the embryo develops.
- Embryology can be used as evidence of evolution as similarities in initial stages of development indicate common origin of the animals.
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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
Select two pairs from the following which exhibit divergent evolution. Give reasons for your answer.
(i) Forelimbs of cheetah and mammals
(ii) Flippers of dolphins and penguins
(iii) Wings of butterflies and birds
(iv) Forelimbs of whales and mammals
Can the wing of a butterfly and the wing of a bat be considered homologous organs? Why or why not?
Enlist any four sequential evolutionary names of human ancestors.
Explain with an example for the given, how the following provides evidence in favor of evolution in organisms :
Analogous organs
Select and write analogous structures from the list given below :
1) Wings of butterfly and birds
2) Vertebrate hearts
3) Tendrils of Bougainvillea and Cucurbita
4) Tubers of sweet potato and potato
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?
The organs P and Q of two animals have different structures but similar functions. On the other hand, the two organs R and S of two other animals have the same basic structure but different functions.
(a) What are the organs like P and Q known as?
(b) Name the organs like P and Q. Also name the animals which have such organs.
(c) What are the organs like R and S called?
(d) Name the organs like R and S. Also name the animals which have such 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.
Differentiate between connecting links and the missing links.
I am a connecting link between reptiles and mammals. Who am I?
Name the parts shown in the diagram.
Human jaw
Observe the given images and answer the following questions.
- Which evolutionary evidence does it indicate?
- What does it prove?
- State another example of evolutionary evidence.
Biogenetic law states that ______.
Homologous organs and vestigial organs are examples of ______ type of evidence in evolution.
Select the CORRECT match.
Select the CORRECT set of homologous organs.
Where is carbon dating used?
Tendons and ligaments are examples of ______.
Basic principles of embryonic development were pronounced by:
Study of fossils is ______.
Evolutionary convergence is the development of:
Which is not a vestigial organ in a man?
The study of fossil evidence of evolution is called ______
What were the characteristics of life forms that had been fossilised?
How do we compute the age of a living tree?
How do we compute the age of a rock?
The evolutionary story of moths in England during industrialisation reveals, that 'evolution is apparently reversible'. Clarify this statement.
Explain divergent evolution in detail. What is the driving force behind it?
You have studied the story of Peppermoths in England. Had the industries been removed, what impact could it have had on the moth population? Discuss.
What is the function of the appendix of our digestive system?
Pick the odd man out:
