Given a disfluent sentence, modify the sentence to it to its equivalent fluent form, preserving the meaning of the sentence.

What is another method no word for the study of past and current life?
What is another word for the study of past and current life?

Are most vexilligera the same or no um are ctenophores the same or different color?
Are most ctenophores the same or a different color?

What can not be distinguished from foreign substances by the antigens no the immune system?

What can not be distinguished from foreign substances by the immune system?