Why can't skin cell divide to produce a muscle cell?​

Which of these statements best describes the st. lawrence seaway? the st. lawrence seaway connects the st. lawrence river with the arctic ocean. the st. lawrence seaway provides an important trading route between the u.s. and mexico. the st. lawrence seaway provides an important trading route for the u.s, but has little value for canada. the st. lawrence seaway connects the great lakes, the st. lawrence river, and the atlantic ocean.

How would you expect the mrna codons that code for the amino acids that make up hemoglobin to compare between humans

Why are human population trends difficult to predict?