Grass leaves curl inwards during very dry weather. Select the most appropriate reason from the following:

(A)Closure of stomata
(B)Flaccidity of bulliform cells
(C)Shrinkage of air spaces in spongy mesophyll
(D)Tyloses in vessels

The NCERT line that answers it

Verbatim line

When they are flaccid due to water stress, they make the leaves curl inwards to minimise water loss.

Chapter: Anatomy of Flowering Plants
Section: 6.2.6 Isobilateral (Monocotyledonous) Leaf
Page: 6
Words matched: 18 of 18

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 that bulliform cells become flaccid during water stress and cause leaves to curl inwards, which directly matches the correct answer option B.

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 check More from this chapter

Question text is reproduced from the published NEET 2019 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.