The supportive skeletal structures in the human external ears and in the nose tip are examples of

Marchantia is an example of.

$A$ plot of the kinetic energy $\left(\frac{1}{2} m v^2\right)$ of ejected electrons as a function of the frequency $(\nu)$ of incident radiation for four alkali metals $(M_1, M_2, M_3, M_4)$ is shown below.
The alkali metals $M_1, M_2, M_3$ and $M_4$ are,respectively:

In a unilocular ovary with a single ovule,the placentation is

$A$ constant torque acting on a uniform circular wheel changes its angular momentum from $A_0$ to $4A_0$ in $4 \ s$. The magnitude of this torque is

$A$ calcite crystal is placed over a dot on a piece of paper and rotated. On seeing through the calcite,one will see: