Curious Facts Quizzes / Nature · 2 questions
What is the cactus’s green column?
Two questions cover photosynthesis and the role of saguaro spines.
No prior knowledge is needed. Choose an answer to see the explanation and evidence.
1Understanding
Which part of the saguaro carries out photosynthesis in this account?
Correct answer: The green stem
The green column is a stem containing chlorophyll.
Evidence: A saguaro cactus photosynthesizes in its green stem. The green column is a stem containing chlorophyll.
2Context
Which description of saguaro spines fits this account?
Correct answer: Modified leaves that help protect and shade the plant
Distinguish where spines come from from the roles they perform.
Evidence: A saguaro’s spines are modified leaves. Distinguish where spines come from from the roles they perform.
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Connected reading
Where does a cactus photosynthesize without broad leaves?