The endosperm of gymnosperms is $...$

Alkali metals lose electrons from which orbitals?

Senescence as an active developmental cellular process in the growth and functioning of a flowering plant,is indicated in

$A$ block of $3\,kg$ is initially in equilibrium and is hanging by two identical springs $A$ and $B$ as shown in the figure. If spring $A$ is cut from the lower point at $t=0$,then find the acceleration of the block in $m/s^2$ at $t=0$. (Take $g = 10\,m/s^2$)

Which of the following lacks a capsid?

Which of the following diseases is caused by a protozoan?