The Fundamental Unit of Life — Science STD 9 — Question

Which of the following factors are responsible for the change in state of solid carbon dioxide when kept exposed to air?

1. Increase in pressure
2. Increase in temperature
3. Decrease in pressure
4. Decrease in temperature

1. (i) and (ii)
2. (i) and (iii)
3. (ii) and (iii)
4. (ii) and (iv)

The graph below shows the distance travelled and the time taken by four cars.
Which car travelled the slowest:

Fish is an important aquatic food which is rich in proteins. The act of capturing, preservation and utilization of fishes is called fish culture.
Among the following statements choose the option which does not describe the benefit of fish culture?

An object weighs 10N in air. When immersed fully in a liquid, it weighs only 8N. The weight of liquid displaced by the object will be:

1. 2N
2. 8N
3. 10N
4. 12N

Actively dividing cells are present in:

Which of the following contains maximum number of molecules?

Animal cell lacking nuclei would also lack in:

During summer, water kept in an earthen pot becomes cool because of the phenomenon of:

Which are not true cells in the blood?