Which of the Following Conclusions Is Supported by the Research

question 38

Multiple Choice

Which of the following conclusions is supported by the research of both Peter Boysen-Jensen and Charles and Francis Darwin on shoot responses to light?

• A) When shoots are exposed to light, a chemical substance migrates toward the light.
• B) A chemical substance involved in shoot bending is produced in shoot tips.
• C) Once shoot tips have been cut, normal growth cannot be induced.
• D) Light stimulates the synthesis of a plant hormone that responds to light.

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