31.  Yes.  A.I.D.S.  a man made virus that alters the chromosomes.  Down Syndrome, Alzeheimer's, Cancer, Polio, Herpes, Hydrocephalic, ...

34.  No. Being they all were originally from the sea.  Some examples are:  The bat, a rat-like mammal with wings.

35.  A rodent is a mammal.

People inside the world trade center are calling 911 and the 911 opertator is telling them to " JUST SIT TIGHT AND DON'T GO ANYWHER...

36.  Mammals are any of various warm-blooded vertebrate animals of the class Mammalia, including human beings, characterized by a covering ...