There are various types of flagella, but all function like a rotary engine made by humans. Even non-ID scientists marvel at the complexity of these machines.
Don’t burden your great research program with Darwin’s mid-1800s view of biology (or any modified descendant of Darwin’s general premise).
No better advertisements for intelligent design exist than works written by establishment scientists that unintentionally make design arguments.
Plant seeds come equipped to spread themselves in ways that baffle engineers. Did they invent these mechanisms by chance?