What trait is used to classify bacteria as their own domain? (Choose all that apply)
Contains a nucleus
Lack of nucleus
Multi-cellular
2
Singe-celled

Which of the following statements is true? 1. the mantle of the earth is made of solid nickel and iron. 2. the crust of the earth is made of solid nickel and iron. 3. the inner core is made of solid nickel and iron.

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

Match each term to its best definition? sedimentary depositional enviornment