Read the following hints:

Read the following lists:

Read the following statements and justify same in your own words with the help of suitable examples. i. Human evolutions began approximatesly 7 crore years ago.

Read the following statements and justify the same in your own words with the help of suitable examples: Study of fossils in an important aspect of study of evolution.

Read the following statements and justify the same in your own words with the help of suitable examples: Geographical and reproductive isoloation of organisms gradually leads to speciation.

Read the following statement? (A) Two sister chromatids are held together by centromere. (B) small disc shaped structure at the surface of centromere are called as kinetochore (C) These structures serve as site attachment of spindle fibres to chromosome

Answer the following question: Two discimilar bulbs are connected in series. Which bulb will be brighter? (Hint: Consider the resistance of the bulb)

Which of the following instruments in generally used with a galvanometer to show null reading?

Answer the following questions: In the following case, state whether work is done or not. Justify your answer: Activity: A student reads a book.

A screw gauge gives the following reading when used to mesure the diametre of a wire. Main scale reading : 0mm Circular scale reading : 52 divisions Given that 1mm on main scale corresponds to 100 divisions of the circular scale. the diameter of wire from the above data is :

Two students performed the same experiment separately and each one of them recorded two readings of mass which are given below correct readings of mass is 3.0 g. on the basis of given data mark the correct option out of the following statements. Student Readings