One of the smallest eukaryotes recently discovered, the green alga Ostreococcus tauri, measures less than ________ across and its genome (8 Mb) is ________ the size of that of Escherichia coli.
A) 2 mm; barely twice B) 500 nm; half C) 10 mm; about D) 1 mm; three times E) 100 mm; five times