What is an example of centripetal acceleration? HELP ASAP!

Ascientist discovers a new body between the orbit of neptune and the kuiper belt. the object is round and travels in an orbit around neptune with other space objects. the scientist claims that she has found a new dwarf planet. where is the scientist’s error?

Which best describes the digestive system of arthropods? a incomplete, two openings b complete, one opening c two-way, one opening d one-way, two openings

Explain how the number of similarities between the embryos from early stage to late stage is used as evidence of a common ancestry