<span>A::T and G:::C is essential. The importance to the DNA structure is that prevents lose of genes and mis-formation of encoded products (protein and mRNA).</span>
The answer is cell membrane
The most observabledifference<span> is the way in which cytokinesis occurs. In </span>plants<span> a new cell wall is fashioned </span>between<span> the new daughter cells, while in </span>animal<span> cells the cell membrane constricts to pinch the parent cell into daughter cells.</span>
Each of a Number of small areas of habitat, typically of one square meter, selected at random to act as samples for assessing the local distribution of plants or animals.
I might be wrong but I think C ( what the wave it traveling through). I think C because a wave medium is the substance that carries a wave (or disturbance) from one location to another. The wave medium is not the wave itself and it doesn’t make the wave. It just Carries or transports the wave from its source to other locations.
