Cells present in the mature pollen grains are __________ .

Observe the diagram and answer the question

(Disclamer: Figures are not to scale)
Which is the correct statement with respect to ecological pyramids?

The Mediterranean orchid Ophrys employs 'sexual deceit mechanism to get pollination done by

Inactive protoxins is converted into its active toxin by:

What does 'r' in equation dN/dt = rN (K-N / K) represent?

Which enzyme is used as a 'clot buster'?

During transcription process in eukaryotes, 'capping' involves:

Which of the following reaction occurs at anode during discharging of lead storage battery?

Arrange the following compounds in increasing order of their reactivity towards HCN .




Choose the correct answer from the options given below:

An earthed conductor is placed near another positively charged conductor. The net charge acquired by the earthed conductor will be :

The solution set of the linear constraints \(x-2 y \geq 0,2 x-y \leq-4, x \geq 0\) and \(y \geq 0\) is

The properties which depend on the number of solute particles irrespective of their nature relative to the total number of particles in the solution are called colligative properties. These are relative lowering of vapour pressure of the solvent, depression of freezing point of the solvent, elevation of boiling point of the solvent and osmotic pressure of the solution. All of these properties help in calculating the observed molar mass of the solute.
Determination of osmotic pressure is considered best for the determination of molecular mass of the solute.
A 1 litre solution of glucose containing 36 g of it has an osmotic pressure of 4.98 bar at 300 K .
At the same temperature, the osmotic pressure of the solution is 1.52 bar.
The concentration of the solution at 1.52 bar is :

\(\int \frac{(x-3) e^x}{(x-1)^3} d x\) is equal to