What are two reasons the united states cut all trade ties with castro’s cuba in 1961?

a. castro shared good relations with us cold war rival, the soviet union.

b. castro declared that he would assassinate us president dwight eisenhower and destroy the us government.

c. castro brought us-owned industries under government’s control.

d. castro started manufacturing hydrogen bombs with the of communist china.

e. castro blocked all trade routes between cuba and united states.

Some organisms have a large geographic range. for example, the norway rat lives on every continent except antarctica. a population of norway rats is the number of rats in one particular area. do you think it’s scientifically possible for a population of norway rats in north america to carry different genetic mutations than a population of norway rats in africa? do you think it’s possible that they carry some of the same mutations? what types of information can scientists learn by studying the genomes of these two populations of rats?