Question

Two different plants associated with discovery of two different phytohormones having common biosynthetic precursor exhibit one of the following characters each
I. Versatile anthers II. Compound spadix III. Pentalocular ovary IV. Trifoliate compound leaves

• A. II and III
• B. I and III
• C. II and IV
• D. I and IV

Answer 1

The correct option is B I and III

Auxin is a phytohormone. It was discovered from the grass Phalaris. It is characterized by versatile anthers. Abscisic acid is also a phytohormone. It was discovered from cotton. It belongs to Malvaceae family which has the characteristic pentalocular ovary. Both these hormones have common biosynthetic precursor named monolonic acid.

Thus, the correct answer is option B.