Is the Y chromosome an accurate indicator of a persons external sex? Paragraph explanation would be appreciated. :)

Each pair of clay balls represents two planetesimals. if each planetesimal is composed of the same material and is separated he the same distance, which pair experiences the frayed gravitational attraction?

The rapid decomposition of organic matter produces evidence which supports: the slow accumulation of coal deposits long ages of the earth rapid burial of vast amounts of vegetation biblical account of noah's flood

Patient has just received an organ transplant which treatment would be most effective in preventing the patient’s body from