What are the advantages and disadvantages of robotic space exploration versus human space exploration?

How does secondary succession differ from primary succession?

Has anyone taken the genetics unit test in connexus? not looking for answers, just a little bit what to expect and some with studying.

Australopithecus robustus was likely the longest-surviving species of australopithecine in south africa. it had: a. large molars, a big face, and a sagittal crest. b. a large body, large teeth, and a sagittal crest. c. a big brain, big teeth, and a big face. d. a big face, large teeth, and a large body