Which of the following layers of Earth is liquid and is responsible for producing Earth's magnetic field?
A) asthenosphere
B) inner core
C) lower mantle
D) outer core
E) Mohorovii discontinuity
Question 2
When a random occurrence produces altered genetic material and inserts new traits into the inherited stream, ________ has occurred.
A) limiting factor
B) mutation
C) Lamarckian evolution
D) vicariance
E) punctuated equilibrium