Membrane-bound organelles are absent in

The equivalent mass of an element is $4$. Its chloride has a vapor density of $59.25$. What is the valency of the element?

Which type of circulatory system is shown in the given figure?

Each category of taxonomic hierarchy is referred to as a unit of . . . . . . .

$11^2 + 12^2 + 13^2 + \dots + 20^2 = ?$

If the equilibrium constant for the reaction,$H_{2(g)} + I_{2(g)} \rightleftharpoons 2 HI_{(g)}$ is $K$,what is the equilibrium constant of $HI_{(g)} \rightleftharpoons \frac{1}{2} H_{2(g)} + \frac{1}{2} I_{2(g)}$?