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प्रश्न
Complete the flowchart.
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उत्तर
संबंधित प्रश्न
Mammals : _________ : : Amphibia : Fishes
What are vestigial organs?
Given below is the list of vegetables available in the market. Select from these the two vegetables having homologous structures:
Potato, sweet potato, ginger, radish, tomato, carrot, okra (Lady’s finger)
(A) Potato and sweet potato
(B) Radish and carrot
(C) Okra and sweet potato
(D) Potato and tomato
Write the similarity between the wing of a butterfly and the wing of a bat. What do you infer from the above with reference to evolution?
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.
Which of the following is a correct set of homologous organs?
(a) Forelimbs of frog, bird and lizard
(b) Spine of cactus and thorn of bougainvillea
(c) Wings of bat and wings of butterfly
(d) Wings of a bird and wings of a bat
Explain the terms analogous and homologous organs with examples.
Find out from newspapers and popular science articles any new fossil discoveries or controversies about evolution.
Give the importance of fossil in support of organic evolution
Human tailbone is a vestigial organ. Explain.
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.
The organs which perform similar functions but have different basic structure are called :
(a) asymmetric organs
(b) analogous organs
(c) homologous organs
(d) homophonic organs
The wings of a housefly and the wings of a sparrow are an example of :
(a) analogous organs
(b) vestigial organs
(c) respiratory organs
(d) homologous organs
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?
Write short notes based upon the information known to you.
Connecting link
Write the names of those animals in whom some vestigial organs in human body are functioning.
Explain with suitable examples importance of anatomical evidence in evolution.
Choose the correct option of the following question:
Wings of Insect and Birds are examples of :
Define fossil.
Define phylogeny.
Find an odd one out.
Write a short note:
Embryological evidences
What is carbon dating?
Biogenetic law states that ______.
Select the correct statement.
The fossil remains of Archaeopteryx is a connecting link between ______
Where is carbon dating used?
Homologous organs are:
Tendons and ligaments are examples of ______.
Which is not a vestigial organ in a man?
Analogous organs arise due to ______.
How do we compute the age of a living tree?
Give a scientific reason.
Morphological evidences suggest that dog, sheep and wolf have a common origin.
Explain natural selection with the example of industrial melanism.
Write avian characters of Archaeopteryx.
Complete the following conceptual picture:
Define Palaeontology.
