From which part of the plant is cocoa obtained from $Theobroma$ $cacao$?

Which of the following is a non-living level of biological organization?

An object takes $n$ times as much time to slide down a $45^{\circ}$ rough inclined plane as it takes to slide down a perfectly smooth inclined plane of the same inclination. The coefficient of kinetic friction between the object and the rough incline is given by:

If $0 < y < 2^{1/3}$ and $x(y^3 - 1) = 1$,then $\frac{2}{x} + \frac{2}{3x^3} + \frac{2}{5x^5} + \dots = $

The equation of the circle with radius $5$ and touching the coordinate axes in the third quadrant is

Living organisms can be distinguished from non-living things on the basis of which ability,excluding exceptions?