Which of the Following Conclusions Is Supported by the Research

question 9

Multiple Choice

Which of the following conclusions is supported by the research of both Frits Went 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)Agar contains a chemical substance that mimics a plant hormone.
• C)A chemical substance involved in shoot bending is produced in shoot tips.
• D)Once shoot tips have been cut,normal growth cannot be induced.