Question

Answer the following questions in brief.
1. Write the names of two plants and their parts useful as food.
2. Why do doctors usually advise us to consume fruits instead of fruit juices?
3. Why can't our elbows bend backwards?
4. Why does a blacksmith use heat to make various tools in his business?
5. A bag of cement kept in the open gets soaked in rain. What will be its condition on
the next day?​

Answer 1

Answer:

3. Our elbow cannot move backwards because it has a hinge joint which allows the movement in one plane only.