Boron in green plants assists in

The natural frequency of an $L-C$ circuit is $1,25,000 \text{ cycles/s}$. Then the capacitor $C$ is replaced by another capacitor with a dielectric medium of dielectric constant $K$. In this case,the frequency decreases by $25 \text{ kHz}$. The value of $K$ is

They do not perform photosynthesis and primarily obtain nutrition through ingestion.

When $AgNO_3$ is heated strongly,the products formed are

Modern farmers have been able to increase rice production by $50\%$ using which of the following?

If the normal to the parabola $y^2=4x$ at $P(1,2)$ meets the parabola again at $Q$,then the coordinates of $Q$ are