3/ Understanding an explanation

To help you prepare for the listening, read the information in the questions carefully and try to predict what information you will hear.

3.1 Read the two multiple-choice questions below. Use the information in the questions to complete the notes on the right.

1 What did the researchers find in their experiments on mice?

A A lack of exercise made them appear older.

B Their cells remained the same as they aged.

C Their cells were unaffected by changes in diet.

The talk is most likely about research done on 1………………. The talk will probably mention 2………… and ……………… .

2 What new discovery have scientists made about pigeons?

A They use the Earth’s magnetic field to navigate

B Their beak plays an important role when flying.

C A part of their ear helps them find their way.

During this talk, we will probably hear about what we already know about 3………. as well as some 4………. information. I need to listen for whether pigeons use the 5………., or their 6………. or ………. to stop them getting lost.

3.2 Listen to the two extracts and answer the questions in 3.1 by choosing the correct answer, A, B or C.

3.3 Why were the other options incorrect?