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प्रश्न
Find an odd one out.
विकल्प
Position of eyes
structure of bones of hand
structure of nostrils
structure of ear pinna
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उत्तर
structure of bones of hand
APPEARS IN
संबंधित प्रश्न
Explain with an example for the given, how the following provides evidence in favor of evolution in organisms :
Homologous organs
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.
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
Explain with an example for the given, how the following provides evidence in favor of evolution in organisms :
Fossils
How do homologous organs help in providing evidence for organic evolution?
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
X, Y, and Z are three animals. The animal X can fly but animal Y can only run on ground or walls. The forelimbs of animals X and Y have the same basic design but they are used for different purposes such as flying and running respectively. The animal Z became extinct an long time ago. The study of fossils of Z tells us that it had some features like those of X and some like those of Y. In fact, Z is said to form a connecting link in the evolutionary chain of X and Y.
(a) What could the animals X, Y and Z be?
(b) What name is given to the forelimbs like those of X and Y which have the same basic design but different functions?
(c) Name one feature in which Z resembled X.
(d) Name one feature in which Z resembled Y.
(e) Which is the correct evolutionary chain involving X, Y and Z : X → Z → Y or Y → Z → X?
Read the following statement and justify same in your own words with the help of suitable example.
There is evidences of fatal science among chordates.
Explain with suitable examples importance of anatomical evidence in evolution.
What are homologous structures?
Long answer question.
Would you consider wings of butterfly and bat as homologous or analogous and why?
Give scientific reason.
Peripatus is said to be the connecting link between Annelida and Arthropoda.
What is carbon dating?
Write the answers to the questions by observing the figure below.
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| (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.
Biogenetic law states that ______.
The degenerated and non-functional organs found in an organism are called ______.
Which of these is not a vestigial organ in human beings?
Why do all the gametes formed in human females have an X chromosome?
Organs having similar functions but different origin and development are known as:
Animal husbandry and plant breeding programmes are the examples of ______.
The bones of forelimbs of whale, bat, cheetah and man are similar in structure, because ______.
What were the characteristics of life forms that had been fossilised?
Give an example for convergent evolution and identify the features towards which they are converging.
Complete the following chart:
Evolutionary convergence is the development of a ______.
Write avian characters of Archaeopteryx.
Write a note on the significance of Palaeontology.
Define the term:
Homologous organs
Industrial melanism was highlighted by ______.
Complete the following conceptual picture:
