Biology
Grade-9
Easy
Question
Match the following:
| a. aquatic birds | 1. Disuse of organs |
| b. flightless birds | 2. Limbed ancestors |
| c. Snakes | 3. Webbed feet |
- a - 1, b - 2, c - 3
- a - 3, b - 1, c - 2
- a - 2, b - 3, c - 1
- a - 3, b - 2, c - 1
Hint:
Lamarck proposed theories like the inheritance of acquired characters, use and disuse, increase in complexity, etc. whereas Darwin proposed theories like inheritance, different survival, species variation, and extinction.
The correct answer is: a - 3, b - 1, c - 2
- Aquatic birds such as ducks are believed to have evolved from terrestrial animals.
- The snakes are believed to have evolved from lizard-like ancestors that have two pairs of limbs.
- It is believed that the ancestors of birds such as the Ostrich were able to fly. Due to some environmental changes, they had a lot of food and were well-protected. They stopped using their wings and as a result, the wings became vestigial.
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