What statement could explain why viruses were not the first to e volve?

In what for do plants utilize nitrogen? why do they need nitrogen?

Based on the topographic map of mt. st. helens, what is the contour interval of the volcano about height is 2,950 m?

The picture showed normal blood cells which are around and sickle cells which appear much longer people with sickle-cell suffer from the sickle cell anemia which is inherited diseaseit is caused by a change in gene responsible for production of hemo goblin this type of change is known as an