The Fundamental Unit of Life — Science STD 9 — Question

Which of following Newton's laws reveals the underlying symmetry in the forces that occur in nature?

One key function of nuclear pore is to

The weight of an object:

A rigid body of mass m kg is lifted uniformly by a man to a height of one metre in 30 sec. Another man lifts the same mass to the same height in 60 sec. The work done on the body against gravitation in both the cases are in ratio:

Which of the labeled parts of the cell is its controlling centre:

A key of a mechanical piano struck gently and then struck again but much harder this time. In the second case:

Find out incorrect sentence:

Two particles are placed at some distance from each other. If, keeping the distance between them unchanged, the mass of each of the two particles is doubled, the value of gravitational force between them will become:

Which of the following is an incorrect match for cellular sap?

Walls of collenchymas are irregularly thickened due to the deposition of: