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प्रश्न
Give a scientific reason.
Morphological evidences suggest that dog, sheep and wolf have a common origin.
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उत्तर
The similarities between dog, sheep, and wolves' jaw structures, eye positions, nare structures, and other anatomical features show that these three animals share a common ancestor.
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संबंधित प्रश्न
Give two examples of vestigial organs in human beings and plants.
Differentiate between homology and analogy. Give one example of each.
(a) Select the homologous structures from the combinations given below:
(i) Forelimbs of whales and bats
(ii) Tuber of potato and sweet potato
(iii) Eyes of octopus and mammals
(iv) Thorns of Bougainvillea and tendrils of Cucurbita
(b) State the kind of evolution they represent.
Explain with an example for the given, how the following provides evidence in favor of evolution in organisms :
Homologous organs
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?
Select two pairs from the following which exhibit divergent evolution. Give reasons for your answer.
(i) Forelimbs of cheetah and mammals
(ii) Flippers of dolphins and penguins
(iii) Wings of butterflies and birds
(iv) Forelimbs of whales and mammals
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 the terms analogous and homologous organs with examples.
Differentiate between analogous and homologous structures.
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 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.
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 the names of those animals in whom some vestigial organs in human body are functioning.
What do you mean by vestigial structures? Name four vestigial organs found in man.
Differentiate between connecting links and the missing links.
Define phylogeny.
Find an odd one out.
Name the parts shown in the diagram.
Human jaw
Appendix : vestigial organ : : Peripatus : ____________
Observe the given images and answer the following questions.
- Which evolutionary evidence does it indicate?
- What does it prove?
- State another example of evolutionary evidence.
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?
Write the answers to the questions by observing the figure below.
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 |
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| (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.
The degenerated and non-functional organs found in an organism are called ______.
Homologous organs and vestigial organs are examples of ______ type of evidence in evolution.
Select the correct statement.
Define vestigial organs.
Homologous organs are:
Study of fossils is ______.
The process of mating of individuals, which are more closing related than the average of the population to which they belong is called ______.
What are we referring to? When we say 'simple organisms' or 'complex organisms'.
Give an example for convergent evolution and identify the features towards which they are converging.
How do we compute the age of a fossil?
Complete the following diagram:
Find the odd one out:
Complete the following conceptual picture:
