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प्रश्न
Write avian characters of Archaeopteryx.
उत्तर
- Feathery exoskeleton.
- Forelimbs are modified into wings.
- Jaws are modified into beak.
- Skull bone is completely fused.
- Large rounded cranium.
- Cranium with large orbits and a single condyle.
- Limb bones are bird like.
- Hind limbs with four toes first toe is opposible.
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संबंधित प्रश्न
“Two areas of study namely 'evolution' and 'classification' are interlinked'. Justify this statement.
Name two animals having homologous organs and two having analogous organs. Name these organs.
Choose the correct option of the following question:
Wings of Insect and Birds are examples of :
Answer the following question:
What are homologous structures? Give an example. Is it necessary that homologous structures always have a common ancestor? Justify your answer.
Find an odd one out.
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.
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Write a short note:
Embryological evidences
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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.
