A woman has three children, aged 4, 6 and 9 years. Why are the children not genetically identical?

This is one form of rna that transports a specific amino acid to a ribosome during protein synthesis.

The picture shows a fishing technique called trawling. how might trawling affect marine biodiversity

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.