How Did the Scientist Marcello Malpighi,in 1679,discover the Role of Phloem

question 14

Multiple Choice

How did the scientist Marcello Malpighi,in 1679,discover the role of phloem?

• A)He observed aphids and cut off their beaks.
• B)He was an early researcher on the cause of maple sap flow in producing syrup.
• C)He observed the effects of girdling a tree below the level of the majority of leaves.
• D)He used radioactive tracers to measure the flow of sap between two distances over time.
• E)He observed the uptake of ink into the stem of celery.

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