Which principal part is this verb form? (is) cutting a. past b. present participle c. past participle d. present

Sea stars, sea urchins, sand dollars, and brittle stars are all memeber of a group, what is the common name of the group they are all in

Advances in technology have enabled scientists and researchers to better study the evolutionary relationships between species

Which two factors contributed to creating a global culture? the creation of the united nations improvement in telecommunications health issues such as the ebola virus increased opportunities for global travel