It is now possible to breed plants and animals with desired characters through:

Which of the following can have a structure with $sp^3$ $C$ atoms only?

If $A=35^{\circ}, B=15^{\circ}$ and $C=40^{\circ}$,then $\tan A \cdot \tan B+\tan B \cdot \tan C+\tan C \cdot \tan A$ is equal to

Current in a circuit falls from $5.0 \, A$ to $0.0 \, A$ in $0.1 \, s$. If an average $emf$ of $200 \, V$ is induced,give an estimate of the self-inductance of the circuit in $H$.

The equivalent resistance between $A$ and $B$ is

Tracheids differ from other tracheary elements in