Each element is made of only one kind of atom
The survival of the 2 percent of the population is due to the presence of a gene obtained from other species. This gene must be responsible for developing resistance in the insects, against the insecticide that was used by the farmer. The gene got incorporated in only 2% of the insects and therefore, they survived and rest of them were susceptible to the insecticide and thus, died.
That is incorrect your brain has same amount of synapses
Slate is composed of mineral quartz and muscovite or illite, it is usually joined by biotite, chlorite, hematite and pyrite.
The answer is either a or c