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प्रश्न
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.
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उत्तर
- The given picture indicates the morphological evidence of evolution.
- Morphological evidence is based on the similarity of size, shape or structure of organs among a group of organisms proving that they evolved from the same ancestor.
- Other examples of evolutionary evidence: Anatomical evidence, paleontological evidence, vestigial organs, embryological evidence, connecting links.
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संबंधित प्रश्न
State the connecting links between Peripatus with Annelida and Arthopoda.
(a) Select the analogous structures from the combination given below:
(i) Forelimbs of whales and bats
(ii) Eyes of octopus and mammals
(iii) Tuber of sweet potato and potato
(iv) Tuber of Bougainvillea and tendrils of Cucurbita
(b) State the kind of evolution they represent
With the help of any two suitable examples explain the effect of anthropogenic actions on organic evolution.
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
An example of homologous organs is
Name the scientists who Discovered the fossil of Australopithecus
What are homologous organs?
Human tailbone is a vestigial organ. Explain.
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?
Out of bacteria, spider, fish and chimpanzee, which organism has a better body design in evolutionary terms? Give reason for your answer.
The organs which perform similar functions but have different basic structure are called :
(a) asymmetric organs
(b) analogous organs
(c) homologous organs
(d) homophonic 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
What do we call the degenerated or partially developed useless organs in living organisms? Enlist such organs in human body? How the same organs are useful in other animals?
Answer the following question.
Wisdom teeth : Vestigial organs :: Lungfish : ....................
_______ is a connecting link between Annelida and Arthropoda.
Complete the following chart:
“Appearance of melanised moths post-industrialisation in England is a classic example of evolution by natural selection.” Explain.
Draw a labelled diagram of T.S. of a leaf showing Kranz anatomy.
Long answer question.
Would you consider wings of butterfly and bat as homologous or analogous and why?
I am a connecting link between reptiles and mammals. Who am I?
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.
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?
How do you differentiate homologous organs from analogous organs?
Select the CORRECT set of homologous organs.
Define vestigial organs.
Evolutionary convergence is the development of:
The presence of gill slits, in the embryos of all vertebrates, supports the theory of ______.
Which of the following is used as an atmospheric pollution indicator?
Fossils are generally found in ______.
How do we compute the age of a living tree?
While creation and presence of variation is directionless, natural selection is directional as it is in the context of adaptation. Comment.
The evolutionary story of moths in England during industrialisation reveals, that 'evolution is apparently reversible'. Clarify this statement.
Explain natural selection with the example of industrial melanism.
Complete the following conceptual picture:
Define Palaeontology.
