People with blood type O are considered to be universal donors. That is, they can
donate blood to all other blood types. Using your knowledge of blood types and the immune
system, explain why this is true.

Because the earth is not round ,but it may seem round when viewed from ,our planet but true some points earth is not round was an oblate spheroid -a square that it squashed as globe however is not even a perfect oblate spheroid.in fact isaac newton's first proposed that earth was not perfectly round but it was an oblate spheroid instead.that mean a square that is squashed as its poles and swollen at the