The word“barren”underlined in Paragraph I most probably means________

单选题The word“barren”underlined in Paragraph I most probably means__________．

[分析]词义题型
参照上题注释，答案为A。

1Which of the following is an example of symbiosis as it is described in Paragraph 2?

2Which of the following can be inferred about the effect of direct sunlight on lichens?

3According to the passage, the algae_____________________.