A main idea question about a study tests whether you can tell what the findings show as a whole. Name the topic, then separate what the researchers did from what they learned. Ask what the results show together, and use the researcher’s conclusion to help you predict the main point in your own words. A choice can repeat a true result and still be wrong if it leaves out what the study means overall.
Hints
- Hint 1
Look at the sentences after the survey description. Separate what the team did from what it learned.
- Hint 2
Look for the reason Romero gives for her conclusion in the final sentence. How does it connect the findings from the second sentence?
Step-by-step
From study findings to the main point
Step 1Name the topic
Romero’s team surveyed populations of wild bumblebees in 25 North American cities. What is the topic? It’s how wild bumblebees are changing in cities, and the main idea must say what the team learned about them rather than describe the survey alone.
- Step 2
Read both findings
What did the team find? The city colonies showed recent interbreeding among formerly isolated lineages, meaning that previously separated bee groups are breeding with each other. Their foraging patterns had also shifted toward earlier morning activity compared with rural colonies. These results give us both genetic and behavioral changes, so a summary about feeding alone would miss part of the study.
- Step 3
See why the pattern matters
Why does Romero see these changes as a pattern rather than isolated events? They were found consistently across all cities studied, leading her to propose a common "city ecotype". An ecotype is a form suited to a particular environment, which here means higher temperatures and food sources spread apart. Our prediction is that the similar genetic and foraging changes suggest adaptation to city life.
- Step 4
Check the whole point
Domesticated honeybees adds bees never mentioned, while endangering the survival adds a threat the text never reports. Temperature fluctuations leaves out the genetic finding and claims a cause the text doesn’t show. The choice with genetic and behavioral changes gives both findings and the proposed city adaptation, and suggest matches Romero’s argument rather than claiming proof. Choice B.