NEET 2014 · Class 11

Plant Growth and Development

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

  1. (A)Abscisic acid
  2. (B)Ethylene
  3. (C)GA3
  4. (D)Indole acetic acid

The NCERT line that answers it

Verbatim line

ABA stimulates the closure of stomata and increases the tolerance of plants to various kinds of stresses.

Chapter
Plant Growth and Development
Section
13.4.3 Physiological Effects of Plant Growth Regulators
Page
11
Words matched
25 of 25

The answer appears as a continuous sentence in NCERT. This is that sentence.

How this line gives the answer

0, emb=1.0, combined=1.0). Verified: high — The span explicitly states 'Therefore, it is also called the stress hormone' in reference to ABA, which directly answers the MCQ.

We did this for 1,565 questions.

Every one traced to the exact sentence in NCERT that answers it, including 90% of the 2026 paper. Sit a mock on the real NEET 2027 computer interface and every mark you drop comes back with its line attached.

Take the free 5-minute checkMore from this chapter

Question text is reproduced from the published NEET 2014 paper for study and commentary. NCERT text is quoted, not redistributed; textbooks remain at ncert.nic.in. Our mapping method, including its measured error rates, is published at /methodology.