Many cells function properly and divide mitotically even though they do not have

Two identical piano wires have a fundamental frequency of $600 \text{ Hz}$ when kept under the same tension. What fractional increase in the tension of one wire will lead to the occurrence of $6 \text{ beats per second}$ when both wires vibrate simultaneously?

The increasing order of the atomic radius of $Si, S, Na, Mg, Al$ is

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

Where is the Natural History Museum located?

Which of the following does not define the functions and characteristics of plants?