Question

Answer the following questions in brief.

1) What are the uses of plants to the humans? Explain in your own words.

2) What is a ball and socket joint? What is the function of it in our body?

3) Write the similarities and differences between the motion of a bicycle and a ceiling fan

that has been switched on.

4) What is the function of bones and muscles in our body?​

Answer 1

Answer:

1. Plants provide many products for human use, such as firewood, timber, fibers, medicines, dyes, pesticides, oils, and rubber. Plants create habitats for many organisms. A single tree may provide food and shelter to many species of insects, worms, small mammals, birds, and reptiles
2. Ball-and-socket joint, also called spheroidal joint, in vertebrate anatomy, a joint in which the rounded surface of a bone moves within a depression on another bone, allowing greater freedom of movement than any other kind of joint
3. Both have circular motion about their respective fixed point. Differences between the motion of a bicycle and a ceiling fan: 1. A bicycle have a linear motion, whereas the blades of a ceiling fan do not have a linear motion.
4. In addition to supporting the weight of the body, bones work together with muscles to maintain body position and to produce controlled, precise movements. Without the skeleton to pull against, contracting muscle fibers could not make us sit, stand, walk, or run.