What is the small,circular $DNA$ molecule present in a bacterial cell,in addition to the main genomic $DNA$,called?

On the interval $[0, 1]$,the function $f(x) = x^{25}(1-x)^{75}$ takes its maximum value at the point

$A$ thin liquid film formed between a $U$-shaped wire and a light slider supports a weight of $1.5 \times 10^{-2} \ N$ (see figure). The length of the slider is $30 \ cm$ and its weight is negligible. The surface tension of the liquid film is (in $N/m$)

On heating,which of the following releases $CO_2$ most easily?

Which of the following is an accessory whorl of a flower?

$A$ straight line is equally inclined to all the three coordinate axes. Then, the angle made by the line with the $y$-axis is