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प्रश्न
Observe the following images and answer the questions.
- Which evolutionary evidences are indicated in the given picture?
- How are they formed?
- Which method is used to measure their age or their time?
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उत्तर
- The given pictures indicate paleontological evidences of evolution.
- Large number of organisms get buried due to disasters like flood, earthquake, volcano, etc. Remnants and impressions of such organisms remain preserved underground and form fossils.
- Carbon dating is a method used to measure the age of fossils.
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संबंधित प्रश्न
What are vestigial organs?
Differentiate between homology and analogy. Give one example of each.
Study the following statements:-
I. Wings of birds and wings of bats are homologous organs.
II. Wings of birds and wings of insects are modified forelimbs.
III. Wings of birds and wings of insects are analogous organs.
IV. Wings of birds and forelimbs of horse are homologous organs.
The correct statements are
(A) I and II
(B) II and III
(C) III and IV
(D) I and IV
Find out from newspapers and popular science articles any new fossil discoveries or controversies about evolution.
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 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
In a class, students were asked to observe the models/slides/pictures of the skeletons of forelimbs and wings of different organisms. After the observations the students made the following groups of homologous structures. Select the correct group :
(A) Wings of a bird and a butterfly
(B) Wings of a pigeon and a bat
(C) Wings of a butterfly and a bat
(D) Forelimbs of a cow, a duck and a lizard
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
Vestigial organ ______ present in human body is proof of evolution.
Complete the following chart:
With the help of diagrams, describe emasculation and bagging.
What do you mean by vestigial structures? Name four vestigial organs found in man.
Choose the correct option of the following question:
Wings of Insect and Birds are examples of :
Explain any three molecular (genetic) evidences in favour of organic evolution.
Define phylogeny.
Long answer question.
Would you consider wings of butterfly and bat as homologous or analogous and why?
Explain any five types of evidence that support the theory of evolution.
Write the answers to the questions by observing the figure below.
 |
 |
 |
| (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.
A human hand, a front leg of a cat, a front flipper of a whale and a bat’s wing look dissimilar and adapted for different functions. What is the name given to these organs?
Select the correct statement.
Select the CORRECT set of homologous organs.
Which of these is not a vestigial organ in human beings?
Which is not a vestigial organ in a man?
Flippers of Penguins and Dolphins are examples of:
The study of fossil evidence of evolution is called ______
Organs having similar functions but different origin and development are known as:
Give an example for convergent evolution and identify the features towards which they are converging.
How do we compute the age of a rock?
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.
Complete the following diagram:
What is the function of the appendix of our digestive system?
Write down the difference between homologous and analogous organs.
Explain natural selection with the example of industrial melanism.
