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प्रश्न
Vestigial organ ______ present in human body is proof of evolution.
विकल्प
Human hand
Appendix
Ear muscles
Tail-bone
Gradual development
Mutation
Gene
Transcription
Translocation
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उत्तर
Vestigial organ appendix present in human body is proof of evolution.
Explanation:
Appendix, which is useless to human, is useful and fully functional organ in ruminants. Similarly, muscles of ear pinna, which are useless to human, are useful in monkeys for movement of ear pinna. Various vestigial organs like tail-bone (coccyx), wisdom teeth, and body hairs are present in body of human being.
Notes
Above question has three possible answers, [Option (B), (C) and (D)].
संबंधित प्रश्न
Mammals : _________ : : Amphibia : Fishes
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
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?
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
Which one of the following pairs of vegetables is an example of homologous structures?
(A) Potato and sweet potato
(B) Carrot and radish
(C) Carrot and tomato
(D) Tomato and radish
Explain with an example for the given, how the following provides evidence in favor of evolution in organisms :
Analogous organs
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?
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 organs P and Q of two animals have different structures but similar functions. On the other hand, the two organs R and S of two other animals have the same basic structure but different functions.
(a) What are the organs like P and Q known as?
(b) Name the organs like P and Q. Also name the animals which have such organs.
(c) What are the organs like R and S called?
(d) Name the organs like R and S. Also name the animals which have such organs.
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
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
Write short notes based upon the information known to you.
Embryology
Write the names of those animals in whom some vestigial organs in human body are functioning.
With the help of diagrams, describe emasculation and bagging.
Draw a labelled diagram of T.S. of a leaf showing Kranz anatomy.
Choose the correct option of the following question:
Wings of Insect and Birds are examples of :
Long answer question.
Would you consider wings of butterfly and bat as homologous or analogous and why?
______ is a vestigial organ in human beings.
Find an odd one out.
Find an odd one out.
Find an odd one out.
Appendix : vestigial organ : : Peripatus : ____________
The decaying process of C-14 occurs continuously in dead organisms only.
Give scientific reason.
Peripatus is said to be the connecting link between Annelida and Arthropoda.
Enlist the evidences of evolution.
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?
Select the correct statement.
The fossil remains of Archaeopteryx is a connecting link between ______
Where is carbon dating used?
The presence of gill slits, in the embryos of all vertebrates, supports the theory of ______.
Organs having similar functions but different origin and development are known as:
Appearance of antibiotic-resistant bacteria is an example of ______.
How do we compute the age of a living tree?
How do we compute the age of a fossil?
How do we compute the age of a rock?
While creation and presence of variation is directionless, natural selection is directional as it is in the context of adaptation. Comment.
