Questions

A plant has taproot and bears flowers. In which class does it fall?

Write the full form of RNA.

Define controlled variable.

Similar stages of different types of cell division are shown in the diagram. If there were four chromosomes in the mother cells.

1. Which of them can form gametes?
2. Which of them forms daughter cells having identical characteristics of mother cell?
3. Write an importance of figure A.

A 12 V rickshaw is charged at a charge station in. Dhangadhi. It is charged using a transformer having 550 turns in primary coil connected in 220 V AC, line.

1. Calculate the number of turns in secondary coil of transformer.
2. Mention the type of transformer used to charge rickshaw. Write down one difference between this transformer and the transformer used in power house.

The diagrams alongside show two main blood vessels. They carry blood into different parts of the body.

1. Identify the blood vessel that has no valve and related with body parts other than lungs.
2. Between them which blood vessel causes heart attack due to blood flow obstruction?
3. Write any two differences between these blood vessels on the basis of pulmonary circulation. 

Defect of vision of two students A and B are shown in the diagram.

1. Between them, who can read the letters written in the board from the last bench?
2. Write any two differences between eyes A and B on the basis of cause of defects.
3. Sketch a ray diagram to correct the defect of eye B.

Prove that 'Watt' is derived unit showing the proper relation among the fundamental units involved in it. Check unit wise homogeneity in $\rm S = ut^2 + \frac {1}{2}at^2$.

Define periodic table and write modern periodic law. In which group of modern periodic table alkali metals and halogens are kept.

A homologous series of a type of hydrocarbon is given in the table alongside. Where, X and Y are given in serial number 2 and 3 instead of the real compounds.

1. Write molecular structure of the compound formed when one hydrogen atom of X is displaced by -OH.
2. Write the structural formula of the compound formed by the removal of one hydrogen atom from two adjacent carbon atoms of Y.