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प्रश्न
What are vestigial organs?
What are vestigial organs? Give one example.
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उत्तर १
Vestigial organs are degenerated or underdeveloped organs of organisms which do not perform any function.
उत्तर २
Vestigial organs are structures which have no apparent function in a particular organism. Examples: Tailbone, wisdom teeth
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संबंधित प्रश्न
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?
Explain the evolution of giraffe's neck according to Lamarck's theory of evolution.
What are homologous organs?
Human tailbone is a vestigial organ. Explain.
Differentiate between analogous and homologous structures.
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 which perform different functions but have the same basic structure are known as :
(a) homologous organs
(b) analogous organs
(c) homolytic organs
(d) analytic 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
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
What do we call the degenerated or partially developed useless organs in living organisms? Enlist such organs in human body? How the same organs are useful in other animals?
Write short notes based upon the information known to you.
Connecting link
Explain with suitable examples importance of anatomical evidence in evolution.
Observe the picture and answer the following questions.
A) Which evidence of evolution is shown in the picture?
B) What can be proven with this proof?
C) Give one more example of evidence of evolution
With the help of diagrams, describe emasculation and bagging.
Choose the correct option of the following question:
Wings of Insect and Birds are examples of :
Explain the importance of Anatomical evidences with examples.
______ is a vestigial organ in human beings.
I am a connecting link between reptiles and mammals. Who am I?
Name the parts shown in the diagram.
Human jaw
Give scientific reason.
Vertebrates have slowly originated from invertebrates.
Define the evidence of evolution shown in the figure.
Which evidence of evolution is shown in the given picture? Explain the importance of this evidence.
Biogenetic law states that ______.
Homologous organs and vestigial organs are examples of ______ type of evidence in evolution.
Why do all the gametes formed in human females have an X chromosome?
Basic principles of embryonic development were pronounced by:
Organs having similar functions but different origin and development are known as:
How do we compute the age of a living tree?
Give an example for convergent evolution and identify the features towards which they are converging.
While creation and presence of variation is directionless, natural selection is directional as it is in the context of adaptation. Comment.
The evolutionary story of moths in England during industrialisation reveals, that 'evolution is apparently reversible'. Clarify this statement.
Complete the following diagram:
As shown in figure below some organisms that share a common ancestor have features that have different functions, but similar structures.
These are known as ______. Give example.
Explain natural selection with the example of industrial melanism.
Define Palaeontology.
