Can someone tell me the menstrual cycle : )

The intervention of extraterrestrials has been used to explain the bermuda triangle, a region of the atlantic ocean where ships and planes are frequently lost, leaving no evidence behind. how would this explanation best be characterized?

Nucleic acid certain protein cell membranes certain carbohydrates

Which number represents a basic ph, 4 or 9? numerical answers expected! answer for blank 1: i'll give