Which characteristics are included in the Kingdom $Monera$?

Two identical $5\,kg$ blocks are moving with the same speed of $2\,m/s$ towards each other along a frictionless horizontal surface. The two blocks collide,stick together,and come to rest. Considering the two blocks as a system,the work done on the system by the external forces will be .............. $Joule$.

Which one of the following is heterosporous?

The number of radial nodes of $3s$ and $2p$ orbitals respectively are

Differentiate between Asexual reproduction and Sexual reproduction.

If $\cos A = \frac{3}{4}$,then $32 \sin \left(\frac{A}{2}\right) \sin \left(\frac{5A}{2}\right) = $