In what geological era were the dinosaurs a dominant life form on earth?
a. cenozoic
b. mesozoic
c. paleozoic
d. phanerozoic

What is one benefit of a non renewable resource, such as natural gas? a. generates large amounts of electricity b. less expensive c. produces pollution d. will run out eventually

Each hereditary trait corresponds to

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?