NEET 2024 Re · Class 12

Organisms and Populations

[DIAGRAM: A graph of population density versus time showing two population growth curves: curve 'a' is a J-shaped exponential growth curve labeled dN/dt = rN, and curve 'b' is an S-shaped logistic growth curve labeled dN/dt = rN((K-N)/K), approaching the carrying capacity K shown by a horizontal dashed line.] What do 'a' and 'b' represent in the following population growth curve?

  1. (A)'a' represents exponential growth when resources are not limiting the growth; and 'b' represents logistic growth when resources are limiting the growth.
  2. (B)'a' represents logistic growth when resources are not limiting the growth; 'b' represents exponential growth when resources are limiting the growth.
  3. (C)'a' represents carrying capacity and 'b' shows logistic growth when resources are limiting the growth.
  4. (D)'a' represents exponential growth when resources are not limiting the growth and 'b' shows carrying capacity.

The NCERT line that answers it

Verbatim line

**Figure 11.3** Population growth curve **a** when responses are not limiting the growth, plot is exponential, **b** when responses are limiting the growth, plot is logistic, **K** is carrying capacity

Chapter
Organisms and Populations
Section
11.1.2 Population Growth
Page
6
Words matched
30 of 30

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

How this line gives the answer

0, emb=0.982, combined=0.9892). Verified: high — The NCERT span explicitly states that curve 'a' represents exponential growth when resources are not limiting, and curve 'b' represents logistic growth when resources are limiting, which directly matches option A.

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Question text is reproduced from the published NEET 2024 Re 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.