Identify the animal below that is not in the same class as the others. crayfish, crabs, scorpions, or lobsters

The similarities of organisms in which two areas numbered above provide the best evidence for common ancestry between organisms in both locations?

Which of these is most likely to happen if parallax measurements of star distances are taken after a gap of six months? the results would be accurate the results would be inconsistent the results would not be valid the results would not be repeated

Number and variety of living organisms includes genetic, species, and ecological types