Question

Q.22 Two experiments are outlined below. Experiment I - When leaf blades were removed from young Coleus plants, leaving the leaf stalks intact, the leaf stalks fell off many weeks before those of control plants. However, if small portions of the leaf blade were left on, the leaf stalks remained on the stem for much longer periods. Experiment II - Leaf blades from Coleus plants were removed leaving the leaf stalk intact. The cut ends of the leaf stalks of half of the plants were covered with lanolin containing auxin. Leaf stalks of the other half of the plants were covered with plain lanolin. The leaf stalks with plain lanolin fell off in a few days; those treated with auxin remained on the plant for as long, or longer, than plants with intact leaves. What hypothesis was being tested by experiment II?

Answer 1

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