How much notice do you have to give? <a href=" http://ngamgirl.net/american-government-research-papers.pdf#maturity ">essay on cervical cancer</a> "So far, no direct ancestors of flowering plants are known," Hochuli said. "Some groups of plants are suspected to be closely related. But the evidence is weak, and most of these groups are thought to be too specialized to be at the base of the flowering plants."