1. Teacher said in class that our body is protected from various microorganisms because there are some defence lines present in the outer parts of our body.
2. The class teacher said that, the small multicellular animal has specialized cells in its epidermis which help it to hunt, defend and move.
3. Special organ of grasshopper performs its respiratory activities, which is different from the respiratory organ of rohita fish.
5. Rahim noticed that the chicks of his father's poultry farm are of two different colours. And the ratio of white to coloured chicks is 13:3. He thought to himself that all the adult hens and cocks of the farm is of white colour, but how some of the chicks became coloured?