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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
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
Explain the terms analogous and homologous organs with examples.
Attempt giving a clear definition of the term species.
Name any two temporary embryonic structures in vertebrates which provide evidence for evolution.
What are homologous organs?
The most common types of fossils are ------------------------.
Choose the correct option of the following question:
Wings of Insect and Birds are examples of :
Short answer question.
Give the significance of fossils.
The decaying process of C-14 occurs continuously in dead organisms only.
Write the answers to the questions by observing the figure below.
 |
 |
 |
| (a) | (b) | (c) |
- Write the name of the animal ‘(a)’ in the figure.
- Write the name of the animal ‘(b)’ in the figure.
- Write the name of the animal ‘(c)’ in the figure.
- Which evolutionary evidence is illustrated by this figure?
- Write the definition of that evidence for evolution.
Define vestigial organs.
The bones of forelimbs of whale, bat, cheetah and man are similar in structure, because ______.
Analogous organs arise due to ______.
How do we compute the age of a fossil?
The evolutionary story of moths in England during industrialisation reveals, that 'evolution is apparently reversible'. Clarify this statement.
Complete the following chart:
Evolutionary convergence is the development of a ______.
Industrial melanism in England after 1850 is an excellent example of Natural selection. Explain how?
