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प्रश्न
Pick the odd man out:
विकल्प
duckbill platypus
pomfret
lungfish
peripatus
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उत्तर
pomfret
Explanation:
In Peripatus, characters like segmented body, thin cuticle, and parapodia-like organs are present. Similarly, duck-billed platypus lays eggs like reptiles but shows relationships with mammals too due to the presence of mammary glands and hairs. Lungfish perform respiration with lungs, irrespective of being fish. These examples indicate that mammals are evolved from reptiles and amphibians from fish.
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संबंधित प्रश्न
Explain with an example for the given, how the following provides evidence in favor of evolution in organisms:
Homologous organs
An example of homologous organs is
The presence of which of the following types of organs in two animals indicates that they are not derived from a common ancestor?
(a) homologous organs
(b) excretory organs
(c) analogous organs
(d) reproductive 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
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?
Identify the following pairs as homologous and analogous organs:
(i) Sweet potato and potato
(ii) Eye of octopus and eye of mammals
(iii) Thorns of Bougainvillaea and tendrils of Cucurbits
(iv) Fore limbs of bat and whale
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
Name the parts shown in the diagram.
Human jaw
Write a short note:
Embryological evidences
Homologous organs and vestigial organs are examples of ______ type of evidence in evolution.
Define vestigial organs.
Flippers of Penguins and Dolphins are examples of:
Which of the following is used as an atmospheric pollution indicator?
The bones of forelimbs of whale, bat, cheetah and man are similar in structure, because ______.
Did aquatic life forms get fossilised? If, yes where do we come across such fossils?
You have studied the story of Peppermoths in England. Had the industries been removed, what impact could it have had on the moth population? Discuss.
Find odd one out:
Industrial melanism in England after 1850 is an excellent example of Natural selection. Explain how?
Give one example of homologous organs found in plants.
