L2：

Lecture 2

第一题

What is the main purpose of the lecture?

ATo demonstrate why observation and experimentation often lead to contradictory conclusions

BTo show how an experiment was used to test a hypothesis

CTo explain why aggressive mimicry is more common among insects than protective mimicry is

DTo describe the differences in the ways that insects and flowers use mimicry

第二题

According to the professor, why has there been very little research on orchid mantises? AThey are difficult to find in the wild.

BThey do not survive in captivity.

CIt was assumed that they were too poisonous to study directly.

DIt was assumed that they had become extinct over a century ago

第三题

Why does the professor discuss butterflies?

ATo help students understand one type of mimicry

BTo explain how researchers designed an experiment

CTo provide an example of an insect that the orchid mantis eats

DTo show that insects other than the orchid mantis mimic flowers

第四题

What point does the professor make when she mentions the spectrometer?

AThe orchid mantis mimics flowers of several different colors.

BBees and humans see colors in a similar way.

CMany experiments can be done without the use of expensive technology.

DThe bees’ perception of color did not affect the experiment’s outcome.

第五题

What conclusion did the researchers draw from their experiment with the sticks?

AThe orchid mantis is spreading to other habitats.

BThe orchid mantis uses aggressive mimicry.

CBees can distinguish between flowers and insects.

DBees tend to visit smaller flowers first.

第六题

What does the professor imply should be studied next about orchid mantises? AWhether they have any natural predators

BWhether their diet has changed since they were first observed

CWhether their use of mimicry has more than one function

DWhether they can mimic various species of flowers