Which scientific phenomenon scientists determine the chemical composition of some stars?

Which type of organism is missing from the food web seen in the illustration? primary consumers decomposers primary producers secondary consumers

Anurse is caring for a 42-year-old client who is scheduled for an amniocentesis during the fifteenth week of gestation because of concerns regarding down syndrome. what other fetal problem does an examination of the amniotic fluid reveal at this time?

During binary fission, what events must occur before the cell splits into two new cells?