Suppose a population of squirrels became separated by a flooding river that carved a deep canyon between the two groups. Think about
the events of speciation that might occur. Identify what would happen
first and what would happen last.

Nephrons, the functional unit of kidneys, are responsible for formation of urine. the sentences describe situations that are the result of problems in the urine formation process. for the nephron shown below, match each situation to the step in the urine formation process where the problem lies.