The bleaching action of $SO_2$ is due to its:

Which one of the following is common to multicellular fungi,filamentous algae,and the protonema of mosses?

Biolistics (gene gun) is suitable for

Which of the following statements is not correct?

If the roots of the equation $4x^3 - 12x^2 + 11x + k = 0$ are in arithmetic progression,then $k$ is equal to

$A$ particle of mass $2\, kg$ is initially at rest. $A$ force acts on it whose magnitude changes with time. The force-time graph is shown below. The velocity of the particle after $10\, s$ is ......... $ms^{-1}$.