Answer:
intestinal sickness are called Shiga toxins producing e coli
Oh yeahhh thanks for the points
Answer:
asteriod strike is most likely to be the one
Explanation:
A volcanic activity would have that stuff
Pioneer species, I think.
Answer:
Magnetic reversal proves seafloor spreading because we can see the polarity of the Earth's magnetic field in rocks. As magma cools, particles in it get “frozen” in the direction of the magnetic field. ... The magnetic evidence shows that the oldest rocks are far away from the ridge and the newest rocks are closest.