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प्रश्न
Give scientific reason.
Vertebrates have slowly originated from invertebrates.
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उत्तर
- The Carbon dating technique used to assess the age of fossils indicated that invertebrates were present on the earth much before the vertebrates.
- Fossils of invertebrates are found buried deep as they are very old and belong to the Palaeozoic era.
- The Cenozoic era showed the presence of mammals and birds. Their fossils were seen in the upper strata of the earth’s crust.
- It was also observed that vertebrates are more complexed than invertebrates.
Therefore, it can be said that vertebrates have slowly originated from invertebrates.
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संबंधित प्रश्न
Which of the following pairs of two vegetables represent the correct homologous structures?
(A) Sweet potato and potato
(B) Sweet potato and tomato
(C) Carrot and potato
(D) Radish and carrot
With the help of any two suitable examples explain the effect of anthropogenic actions on organic evolution.
How analogy and homology considered as an evidence in support of evolution ?
Which of the following is a correct set of homologous organs?
(a) Forelimbs of frog, bird and lizard
(b) Spine of cactus and thorn of bougainvillea
(c) Wings of bat and wings of butterfly
(d) Wings of a bird and wings of a bat
Four students A, B, C and D reported the following set of organs to be homologous. Who is correct ?
(A) Wings of a bat and a butterfly
(B) Wings of a pigeon and a bat
(C) Wings of a pigeon and a butterfly
(D) Forelimbs of cow, a duck and a lizard
Explain the terms analogous and homologous organs with examples.
Attempt giving a clear definition of the term species.
Explain with an example for the given, how the following provides evidence in favor of evolution in organisms :
Fossils
Select and write analogous structures from the list given below :
1) Wings of butterfly and birds
2) Vertebrate hearts
3) Tendrils of Bougainvillea and Cucurbita
4) Tubers of sweet potato and potato
The organs which perform different functions but have the same basic structure are known as :
(a) homologous organs
(b) analogous organs
(c) homolytic organs
(d) analytic organs
Wing of an insect and forelimb of a bird are :
(a) analogous organs
(b) analeptic organs
(c) homologous
(d) homophobic organs
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 ______
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(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.
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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
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
Answer the following question.
Wisdom teeth : Vestigial organs :: Lungfish : ....................
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What do you mean by vestigial structures? Name four vestigial organs found in man.
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Similarities in the initial stages indicate the _______ evidence.
Define the evidence of evolution shown in the figure.
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Which evidence of evolution is shown in the given picture? Explain the importance of this evidence.
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?
Explain any five types of evidence that support the theory of 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?
How do you differentiate homologous organs from analogous organs?
Homologous organs and vestigial organs are examples of ______ type of evidence in evolution.
The fossil remains of Archaeopteryx is a connecting link between ______
Palaeontological evidence for evolution refers to the ______.
The process of mating of individuals, which are more closing related than the average of the population to which they belong is called ______.
Which is not a vestigial organ in a man?
Flippers of Penguins and Dolphins are examples of:
Did aquatic life forms get fossilised? If, yes where do we come across such fossils?
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.
Explain natural selection with the example of industrial melanism.
Give one example of homologous organs found in plants.
Pick the odd man out:
