Which of the following prevents the collapsing of the trachea?

The output $(X)$ of the logic circuit shown in the figure will be:

Which scientific term is used for a convenient category for the study of organisms like fish and mammals?

$A$ body of mass $m = 10^{-2} \; kg$ is moving in a medium and experiences a frictional force $F = -kv^2$. Its initial speed is $v_0 = 10 \; m/s$. If,after $10 \; s$,its energy is $\frac{1}{8} mv_0^2$,the value of $k$ will be:

The Cartesian form of the polar equation $\theta = \tan^{-1} 2$ is

Which of the following is a non-reducing sugar?