Humans have 23 chromosome pairs. other members of the hominidae, including chimpanzees, gorillas, and orangutans, have 24. what could have caused this difference

well, that's easy; the answer's c, "it reduces contamination of the water and substrate of the estuary."

the alkaline earth metals (beryllium (be), magnesium (mg), calcium (ca), strontium (sr), barium (ba), and radium (ra)) are a group of chemical elements in the s-block of the periodic table with very similar properties: shiny. silvery-white. hopefully this ? i didn't fully understand the question