By extracting short pieces of the dodo’s DNA and (644) _____ these with the DNA of living birds, the scientists were able to deduce when the dodo evolved away from its relatives into a separate entity.

Which of the following is closest in meaning to crux in paragraph 4?

According to the text, what is the importance of candles?

The word " evolved" is closest in meaning to _________.

According to the passage, we respond to others by _________.

The best title for the passage is ________________.

The changes possibly caused by the cell phones are mainly concerned with ____________.

What is the passage mainly about?

Why is the example of the Industrial Revolution given?

According to the text, what dose the increase of candle sales illustrate?

What does the author mean by stating that “function should determine form”?

According to the passage, what makes mobile phones potentially harmful is ____________.

Many studies on emotional expressions try to answer the question whether _________.

Which of the following is NOT mentioned as evidence that the length of the workweek has been declining since the nineteenth century?