Singular to Plural

Question 1

-a

Answer 1

-ae (Vertebra (singular) becomes vertebrae (plural).)

Question 2

-ex, -ix

Answer 2

-ices (Apex (singular) changes to apices (plural); appendix (singular) becomes appendices (plural).)

Question 3

-is

Answer 3

-es (Diagnosis (singular) becomes diagnoses (plural))

Question 4

-nx

Answer 4

-nges (Phalanx (singular) with one digit such as finger or toe, when counting more than one, changes to phalanges (plural).)

Question 5

-um

Answer 5

-a (Atrium (singular) changes to atria (plural).)

Question 6

-us

Answer 6

-i (Bacillus (singular) becomes bacilli (plural).)