What type of concern is raised by embryonic stem cell research?

All annelids and arthropods have a blank body plan . unlike annelids, arthropods also have blank . the circulatory system of annelids is blank , while circulatory system of arthropods is blank .

Select the word from the list that best fits the definition apparent movement of a star used to measure its distance from earth

The word belongs in a different group than all of the other words in the list.