L1：
Question 6 of 17
What is the lecture mainly about?
A series of experiments on the evolution of animal intelligence
The differences in intelligence among various bird species
The results of a series of related studies on tool use by birds
The reasons that birds often use tools to obtain food in the wild
Question 7 of 17
Why does the professor mention the fable about the crow and the pitcher of water?
To explain a mistaken idea about how crows obtain food
To explain the inspiration for a recent study on tool use by animals
To point out the difficulty of observing tool use by animals in the wild
To suggest that crows should be the focus of more scientific research
Question 8 of 17
What does the professor imply about the first experiment that she describes?
The experiment was difficult for the researchers to design.
The experiment needs to be repeated with other birds in the crow family.
The results suggest that rooks are able to solve new problems.
The results suggest that rooks may have already learned to use tools in the wild.
Question 9 of 17
What point does the professor make when she mentions rooks using tools obtained outside the laboratory?
The rooks chose only large stones as tools to obtain their food.
The rooks preferred using the tools in the laboratory to tools obtained outside.
The rooks successfully obtained food by observing tool use in other birds.
The rooks were able to remember the size of the tubes to find stones of the right size.
Question 10 of 17
What does the professor find particularly interesting about the experiment with the branched stick?
The rooks modified the stick to make it useful.
The rooks preferred to use stones instead of the stick.
The rooks obtained their food faster with the stick than with the stones.
The rooks worked together to obtain their food.
Question 11 of 17
What does the professor find surprising about the studies?
They confirm that animal intelligence is primarily linked to tool use.
They reveal behaviors that had not been observed in wild rooks.
They provided only limited evidence of animals using tools in the wild.
They challenge the findings of previous research about rooks and crows.
