How long ago do scientists believe the continents formed pangaea? about 135 million years ago about 180 million years ago about 300 million years ago about 4.5 billion years ago

Describe pasteur’s results and how they disprove spontaneous generation.

Legumes, a type of plant, require rhizobia, a type of soil bacteria, to survive since these organisms fix nitrogen during photosynthesis. rhizobia use the legumes for food. what would most likely happen to the legume population if rhizobia suddenly became extinct?

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?