Which of the following particles has almost no mass?

The use of dna as evidence in criminal investigations became possible because of the

Leila has dimples because she received a gene copy from her father that coded for dimples. this means that dimples are an example of a trait that is

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.