Which of the following is not an embryophyte?

Aluminium is extracted from alumina $(Al_2O_3)$ by electrolysis of a molten mixture of:

$10 \ g$ of a radioactive element is disintegrated to $1 \ g$ in $2.303 \ \text{minutes}$. What is the half-life (in minutes) of that radioactive element?

The transfer of energy from organism to organism in a natural community establishes

The position vectors of $P$ and $Q$ are respectively $\overrightarrow{a}$ and $\overrightarrow{b}$. If $R$ is a point such that $\overrightarrow{PR}=5 \overrightarrow{PQ}$, then the position vector of $R$ is

Under which one of the following conditions do real gases approach the ideal gas behaviour?