17 children are on the bus. then 20more children get on the bus. how many children are on the bus now?

Traffic facing a circular signal may proceed straight through cautiously or turn right or left unless a sign prohibits either such turn.

Awebsite that was updated two years ago is probably a. as reliable as any other website. b. still up-to-date. c. less reliable. d. more reliable.

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?