Breeding crops with higher levels of vitamins,minerals,and proteins is known as ..........

Hydrogen behaves as an oxidising agent when it reacts with

The salivary gland chromosomes in the dipteran larvae are useful in gene mapping because

Two slabs $A$ and $B$ of equal surface area are placed one over the other such that their surfaces are completely in contact. The thickness of slab $A$ is twice that of $B$. The coefficient of thermal conductivity of slab $A$ is twice that of $B$. The first surface of slab $A$ is maintained at $100^{\circ} C$,while the second surface of slab $B$ is maintained at $25^{\circ} C$. The temperature at the contact of their surfaces is (in $^{\circ} C$)

The maximum value of ${x^4}{e^{ - {x^2}}}$ is

$A$ particle executes a simple harmonic motion of time period $T$. Find the time taken by the particle to go directly from its mean position to half the amplitude.