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प्रश्न
Define vestigial organs.
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उत्तर
Vestigial organs are degenerate organs that are inadequately developed and non-functional. They could be useful in certain related and unrelated species, as well as in ancestors.
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संबंधित प्रश्न
Mammals : _________ : : Amphibia : Fishes
Explain with an example for the given, how the following provides evidence in favor of evolution in organisms :
Homologous organs
If you are asked to select a group of two vegetables, out of the following, having homologous structures which one would you select?
(a) Carrot and radish
(b) Potato and sweet potato
(c) Potato and tomato
(d) Lady finger and potato
How analogy and homology considered as an evidence in support of 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.
Can the wing of a butterfly and the wing of a bat be considered homologous organs? Why or why not?
Explain the terms analogous and homologous organs with examples.
Enlist any four sequential evolutionary names of human ancestors.
How do homologous organs help in providing evidence for organic evolution?
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?
Name two animals having homologous organs and two having analogous organs. Name these organs.
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 presence of which of the following types of organs in two organisms indicates that they are derived from the same ancestor?
(a) analogous organs
(b) respiratory organs
(c) digestive 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?
Vestigial organ ______ present in human body is proof of evolution.
Explain with suitable examples importance of anatomical evidence in evolution.
_______ is a connecting link between Annelida and Arthropoda.
Complete the following chart:
With the help of diagrams, describe emasculation and bagging.
Explain any three molecular (genetic) evidences in favour of organic evolution.
Define fossil.
Differentiate between connecting links and the missing links.
______ is a vestigial organ in human beings.
Define the evidence of evolution shown in the figure.
What is carbon dating?
Why do all the gametes formed in human females have an X chromosome?
Tendons and ligaments are examples of ______.
Palaeontological evidence for evolution refers to the ______.
Study of fossils is ______.
The process of mating of individuals, which are more closing related than the average of the population to which they belong is called ______.
Which of the following is used as an atmospheric pollution indicator?
Did aquatic life forms get fossilised? If, yes where do we come across such fossils?
Find the odd one out:
Explain natural selection with the example of industrial melanism.
Industrial melanism was highlighted by ______.
Define Palaeontology.
