Biology 2nd Paper CQ-Jessore Board-2019

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3. While going to play, Akhi watched an insect on grass to jump. To know about this insect she asked her father. Father said, "Its excretion mechanism is different. Excretory materials climinate with digestive waste materials. In our case, even though blood transmits $\mathrm{O}_{2}$ but blood does not play any role for respiration of this animal. It has special type of respiratory system where transmission of $\mathrm{O}_{2}$ is not required."

4. During cooking, Shima put her hand in the fire and took it away quickly. Her sister Rima is a student of science. Pointing to the incident, she said, "It is also one kind of behaviour. More such incidents of this behaviour happen in our case. For example, if anyone gets struck in the leg, moves his/her, leg with furiousness, automatically close one's eye when fall something in it, etc."

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