L1：

Question 6 of 17

What is the lecture mainly about?

Reasons most leaves change colors in autumn

The cause of green patches in some autumn leaves

How leaf-miner larvae acquire endosymbionts

How trees benefit by hosting leaf-miner larvae

Question 7 of 17

In what way do cytokinins benefit leaf miners?

They produce hormones that encourage reproduction.

They protect leaf miners against bacteria.

They help maintain leaf miners’ sources of food.

They help leaf miners digest food.

Question 8 of 17

According to the professor, what does a photosynthetically active patch on a leaf make possible?

A greater number of new leaves in the spring

An increase in the tree’s protection from disease

More time for leaf-miner moths on the leaf to reproduce

A decrease in the amount of Wo/bachia bacteria in leaf-miner moths on the leaf

Question 9 of 17

What is one step researchers took in investigating the relationship between Wolbachia and cytokinins?

They injected Wolbachia into apple tree leaves.

They removed the green islands from entire trees.

They fed Wolbachia to leaf miners.

They destroyed the Wolbachia in female moths.

Question 10 of 17

What do the results of the experiment on leaf miners demonstrate?

Select 2 answers.

Wolbachia are part of the process in producing green islands.

Only mature leaf miners produce cytokinins.

Leaf miners inherit endosymbionts.

Leaf miners can feed on both live and dead leaf tissue.

Question 11 of 17

What does the professor imply about the results of the experiment?

The results did not provide any new information about green islands.

The results did not answer the question she feels is most important.

The results were based on insufficient data.

The results should be reevaluated to determine their usefulness.