What do these two changes have in common? water boiling on a stove
snowflakes forming in a cloud
Select all that apply.

Both are changes of state
both are only physical changes
both conserve mass
both are chemical changes

Which of the following is the best definition of a eukaryota? a. a one-celled organism that does not have a membrane-bound nucleus b. a one-celled organism that does not have a cell wall c. an organism whose cells each contain a membrane-bound nucleus d. an organism whose cells each have a cell wall