How can people have the same/similar readings on certain sites of DNA profiles?

What do lava flows made of aa indicate about the type of volcanic eruption that occurred? a. the eruption was viscous. b. the eruption was pyroclastic. c. the eruption was explosive. d. the eruption was quite. !

Which beat describes the brain stem

Methane gas created by a cows flatulence especially in a large herd is a greenhouse gas. true or false.