Plants deficient in the element zinc show effects on the biosynthesis of which plant growth hormone?

The order of the differential equation whose solution is $y = a \cos x + b \sin x + c e^{-x}$ is:

If the normal to the curve $y(x) = \int_0^x (2t^2 - 15t + 10) dt$ at a point $(a, b)$ is parallel to the line $x + 3y = -5$,where $a > 1$,then the value of $|a + 6b|$ is equal to...........

The ratio between kinetic and potential energies of a body executing simple harmonic motion,when it is at a distance of $\frac{1}{N}$ of its amplitude from the mean position is

There is some change in length when a $33000 ~N$ tensile force is applied on a steel rod of area of cross-section $10^{-3} ~m^2$. The change of temperature required to produce the same elongation,if the steel rod is heated,is (The modulus of elasticity is $3 \times 10^{11} ~N/m^2$ and the coefficient of linear expansion of steel is $1.1 \times 10^{-5} /{ }^{\circ} C$). (in $^{\circ} C$)

In a gene bank,valuable plant materials are stored in a living state. $A$ gene bank is a part of which of the following?