Another name for unicellular organisms that dominated earth up to the precambrian time is
a. eukaryotes.
b. cyanobacteria.
c. stromatolites
d. prokaryotes.

Which technically is nasa developing that will astronauts reach mars

Which element provides strength to the exoskeleton of clams and oysters

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?