Misc: Babies knee caps don't appear until the child reaches ________ years of age?

Questions

owls are one of the only birds who can see which colour?

ulna, radius, and clavicle are types of __________?

which country in southern african was previously known as bechuanaland?

bow wow wow asked one of their early members to leave the group because he was too outspoken. who was he?

this pouty french beauty became world cinema's reigning sex symbol after marilyn monroe's death?