Which statement best describes a recession?

More people are unemployed, causing more competition for jobs.
The prices of goods make them too expensive for people to buy them easily.
People cannot afford to buy goods because competition leads to higher prices.
A large number of people are unemployed and have decreased spending power.

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?