Practice question
Question
Brassinosteroids were first isolated from pollen of:
Explanation
Correct option is B, Brassica napus. In Brassinosteriod problems like this, the accurate statement is Brassica napus; the others are common mix-ups. Not these: A) Arabidopsis thaliana; C) Oryza sativa; D) Zea mays. Tissue transport questions usually turn on xylem vs phloem, living vs dead cells, or source vs sink.
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