NEET 1991 · Class 11

Cell: The Unit of Life

An organised and differentiated cellular structure having cytoplasm but no nucleus is

  1. (A)vessels
  2. (B)xylem parenchyma
  3. (C)sieve tubes
  4. (D)tracheids

The NCERT line that answers it

Verbatim line

Some mature cells even lack nucleus, e.g., erythrocytes of many mammals and sieve tube cells of vascular plants.

Chapter
Cell: The Unit of Life
Section
8.5.10 Nucleus
Page
15
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=0.9865, combined=0.5919). Verified: high — The span explicitly states that sieve tube cells lack a nucleus, which is the specific biological fact needed to answer the MCQ correctly.

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