Sign in
12thPass logo
New chatPYQ LibraryDoubtsRank report
Sign in to see Recents

Your guest activity stays on this device

Sign in to save progress →
Sign in

Organisms and Populations question

2016 · Q51
Guest · filters and generic practice availableBrowsing as a guest · PYQ filters and generic practice are available. Sign in only for personalised features and saved progress.
  1. PYQ Library
  2. /NEET
  3. /Biology
  4. /Organisms and Populations
  5. /2016 · Q51

Organisms and Populations question

2016 · Q51

NEETBiologyOrganisms and PopulationsMCQ+4 / −1
When does the growth rate of a population following the logistic model equal zero?
The logistic model is given as dN/dt = rN(1-N/K)
  1. A
    When death rate is greater than birth rate.
  2. B
    When N/K equals zero.
  3. C
    When N/K is exactly one.
  4. D
    When N nears the carrying capacity of the habitat.
View written solutionFree

Correct answer: C

In logistic growth model population growth equation is described as
dNdt=rN(1−NK){{dN} \over {dt}} = rN\left( {1 - {N \over K}} \right)dtdN​=rN(1−KN​)
N = population density at time t;
r = Intrinsic rate of natural increase;
K = carrying capacity
When N/K = 1; 1−NK{1 - {N \over K}}1−KN​ = 0
Therefore, dNdt=0{{dN} \over {dt}} = 0dtdN​=0

PreviousNext

More from Organisms and Populations

  • If '+' sign is assigned to beneficial interaction, '–' sign to detrimental and '0' sign to neutral interaction, then the population interaction represented by '+' '–' refers to2016 · MCQ
  • Which of the following is correct for r-selected species ?2016 · MCQ
  • The principle of competitive exclusion was stated by2016 · MCQ
  • An association of individuals of different species living in the same habitat and having functional interactions is -2015 · MCQ
  • In which of the following interactions both partners are adversely affected?2015 · MCQ
  • The following graph depicts changes in two populations (A and B) of herbivores in a grassy field. A possible reason for these changes is that: Includes diagram2015 · MCQ
  • Just as a person moving from Delhi to Shimla to escape the heat for the duration of hot summer, thousands of migratory birds from Siberia and other extremely cold northern regions move to:2014 · MCQ
  • The age pyramid with broad base indicates :2013 · MCQ