Loading question...
You are in free guest mode. Timed Practice Revision List Attempt History Progress Tracking Create a free account to unlock these tools
Back to Questions
Prev Next
Practice Listening: Highlight Incorrect Words ID: #32812 Short Evolution 2
Instructions ›
You will hear a recording. Below is a transcription of the recording. Some words in the transcription differ from what the speaker said. Please click on the words that are different.
* Click on the words that are different from what you hear
Result:

Correct Transcript:

If you want to see evolution at work, visit a hospital. Inside a sick patient, antibiotics wipe out infectious bacteria by the millions. But germs are always mutating. A few adapt to resist the drug, so they survive—and spread. Such antibiotic bacteria infect two million Americans every year; they kill 23,000. In this arms race between medicine and evolution, evolution is winning. But could we turn evolution against bacteria? It turns out that when bacteria mutate to become resistant to one antibiotic, they often become more vulnerable to a different drug. So maybe after a jab with the left, a roundhouse to the right will deliver a knockout blow. To test this idea, researchers in Denmark dosed batches of E. coli with 23 different antibiotics, and waited for resistance to evolve.
AI explanationShows the answer. Tap to open.
Printed "perfusion", the speaker says "evolution"

Explanation: On the recording the words are "evolution at work". "perfusion" is on the page, but you hear a different first letter, so listen to the whole word.

Printed "insignia", the speaker says "bacteria"

Explanation: Listen again to "infectious bacteria by". Both words start with different letters, so trust your ears, not the page.

Printed "tenet", the speaker says "antibiotic"

Explanation: In the audio you hear "Such antibiotic bacteria". "tenet" is much shorter and does not fit here, so click the printed word.

Printed "answerable", the speaker says "vulnerable"

Explanation: Here the speaker says "more vulnerable to a". They start with different first letters, so listen to the beginning.

Printed "streetwalkers", the speaker says "researchers"

Explanation: The speaker says "researchers in Denmark dosed", not "streetwalkers". The printed and spoken words begin with different letters, so hear the first letter change.

"hospital" matches the audio

Explanation: "visit a hospital" is a normal phrase that looks safe but may distract you. The speaker says it exactly, so do not click it.

"spread" matches the audio

Explanation: "so they survive, and spread" comes after a dash and may seem tricky. It matches the audio exactly, so do not click it.

The rest of this explanation is for members. Sign in free to read why the other options are wrong, key words and tips.

Sign in to read the full explanation

With a free account: Retry and compare every attempt.
Be the first! No community answers here yet. Submit yours and help others learn.
Saving...