Question

Q4. Answer the following questions in short (6 marks)

1. What do you mean by fixed and movable joints?

2. State the names of animals and plants that are found in deserts.

3. Why is the standard (universal) unit of length needed?​

Answer 1

Answer:

2= camels and cactii or cactus plant found in desert

3=A unit of measurement which has a fixed value which does not change from person to person or place to place, is called a standard unit of length. It is necessary to have standard units of measurements for the sake of uniformity in