Is it plagiarism?

Is it plagiarism?

You are now going to read seven essay extracts based on a quotation from a text.
Decide if you think the student has plagiarised - some may be more obvious than others!

Original text:

"During the last 60 years the development of effective and safe drugs to deal with bacterial infections has revolutionised medical treatment, and the morbidity and mortality from microbial disease have been dramatically reduced."

Pharmacology (4th edition) by Rang, Dale and Ritter.

Extract 1:

During the last 60 years the development of effective and safe drugs to deal with bacterial infections has revolutionised medical treatment, and the morbidity and mortality from microbial disease have been dramatically reduced.

Is this plagiarism?