Which of the following is true for organisms of the same species?

With an increase in atomic number,the melting point of alkali metals .......

In which of the following complexes is the oxidation state of the metal zero?

The new crop $Triticale$ was developed by intergeneric hybridization between which of the following?

Four charges are placed at the circumference of the dial of a clock as shown in the figure. If the clock has only an hour hand,then the resultant force on a positive charge $q_0$ placed at the center points in the direction which shows the time as: (in $:30$)

The figure shows three similar lamps $L_1, L_2$,and $L_3$ connected across a power supply. If the lamp $L_3$ fuses,how will the light emitted by $L_1$ and $L_2$ change?