Animals in the same phylum arthropoda must also be in which same taxon

The deserts of the sahara and australia are associated with

Why reason best illustrates why hershey and chase chose to use viruses in their experiment?

Prior to the mt. st. helens eruption on may 18, 1980, satellite and topographic views of the volcano were captured. based on the topographic map of mt. st. helens, what is the contour interval if the volcano height is 2,950 m? question 9 options: 600 m 400 m 750 m 500 m