The maximum number of sub-levels,orbitals and electrons in $N$ shell of an atom are respectively

Which of the following is considered an acellular organism?

Which of the following is not a class of $Bryophytes$?

Lungs do not collapse between breaths and some air always remains in the lungs which can never be expelled because

Complete hydrolysis of cellulose yields ........

$A$ uniform rod of mass $M$ and length $L$ is placed on a smooth horizontal surface. $A$ horizontal force $F$ is applied at one end of the rod perpendicular to its length. The acceleration of the centre of mass of the rod is: