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प्रश्न
Write the names of those animals in whom some vestigial organs in human body are functioning.
Write name of those animals in which these vestigial organs are functional.
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उत्तर
- It is useful in monkeys and other animals, such as rabbits, cows, and horses, for the movement of the ear pinna.
- Appendix is fully functional in ruminants for the digestion of cellulose.
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संबंधित प्रश्न
With the help of any two suitable examples explain the effect of anthropogenic actions on organic evolution.
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?
Some dinosaurs had feathers although they could not fly birds have feathers that help them to fly. In the context of evolution, this means that ______
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?
Select a set of homologous organs from the following:
(A) Wings of a bat and wings of a butterfly
(B) Wings of a pigeon and wings of a bat
(C) Wings of a butterfly and wings of a pigeon
(D) Forelimbs of a duck, forelimbs of a cow and forelimbs of a lizard
Explain with suitable examples importance of anatomical evidence in evolution.
The most common types of fossils are ------------------------.
What are homologous structures?
Find an odd one out.
Match the following.
| Column A | Column B |
| 1) Morphological evidences | a) Tail-bone or wisdom teeth |
| 2) Paleontological evidences | b) Leaf venation |
| c) Fossils |
Give scientific reason.
Peripatus is said to be the connecting link between Annelida and Arthropoda.
Give scientific reason.
Vertebrates have slowly originated from invertebrates.
Complete the flowchart.
How do you differentiate homologous organs from analogous organs?
The fossil remains of Archaeopteryx is a connecting link between ______
Where is carbon dating used?
Give an example for convergent evolution and identify the features towards which they are converging.
Complete the following chart:
Find the odd one out:
