AIPMT 2015 Cancelled Paper | Plant Growth and Development Question 20 | Biology

Dr. F. went noted that if coleoptile tips were removed and placed on agar for one hour, the agar would produce a bending when placed on one side of freshly-cut coleoptile stumps. Of what significance is this experiment?

It made possible the isolation and exact identification of auxin.

It is the basis for quantitative determination of small amounts of growth-promoting substances.

It supports the hypothesis that 1AA is auxin.

It demonstrated polar movement of auxins.

AIPMT 2014

MCQ (Single Correct Answer)

-1

Which one of the following growth regulators is known as 'stress hormone'?

Abscisic acid

Ethylene

GA₃

Indole acetic acid

AIPMT 2014

MCQ (Single Correct Answer)

-1

A few normal seedlings of tomato were kept in a dark room. After a few days they were found to have become white -coloured like albinos. Which of the following terms will you use to describe them?

Mutated

Embolised

Etiolated

Defoliated

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