A shared derived character is a characteristic or trait that two lineages share.
For example, amphibians, turtles, lizards, snakes, crocodiles, birds and mammals all have, or historically had, four limbs. ... Four limbs is a shared derived character inherited from a common ancestor that helps set apart this particular clade of vertebrates.
Since water does not have charged particles, water is a non-conductor. When some solutes dissolve in water they allow an electric current to flow through the water and the solution conducts electricity. These solutes are called electrolytes. ... Non-electrolytes like sugar dissolve to form molecules in solution.
(20*1000)÷(molecular weight of H3po4*50)
A nitrogen atom has 5 electrons in its outermost shell. A nitrogen atom achieved octet of valence electrons by sharing 3 pairs of electrons with another atom.
Thus, when nitrogen fills it's valence shell it achieve octet and become inert, that is, unreactive.
B. plastic is not a good conductor of heat