The coiling of garden pea tendrils around a support is an example of which phenomenon?

$\log _4 2 - \log _8 2 + \log _{16} 2 - \dots$ is equal to

Which chemical must be applied to the roots to keep the leaves of a plant green?

The energy-releasing metabolic process in which substrate is oxidized without an external electron acceptor is called:

$A$ steel rod $100 \, cm$ long is clamped at its middle. The fundamental frequency of longitudinal vibrations of the rod is $2.53 \, kHz$. What is the speed of sound in steel in $km/sec$?

Which of the following alkaline earth metal nitrides is volatile?