Logistic Growth

Q. The sigmoid growth curve

1. Is the logistic growth curve
2. Is the exponential growth curve
3. Is the carrying capacity
4. All of the above

Q.

The first stage of the S-shaped growth curve of the population is

1. Log phase

2. Lag phase

3. Phase of acceleration

4. Phase of deceleration

Q. When does the growth rate of a population following the logistic model equal zero?

Q. All population in real world show logistic growth rather than exponential growth. Which of the following describes best why exponential growth is not possible?

1. The resources are unlimited
2. Organisms conserve energy by not reproducing
3. Carrying capacity of the population is achieved
4. All of these

Q. 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. When N/K is exactly one
2. When N nears the carrying capacity of the habitat
3. When N/K equals zero
4. When death rate is greater than birth rate

Q. The sigmoid growth curve has four phases.Choose the correct sequence in which it occurs

1. (i) Log phase., (ii) Lag phase., (iii) Stationary phase., (iv) Death phase
2. (i) Stationary phase., (ii) Log phase., (iii) Lag phase., (iv) Death phase
3. (i) Lag phase., (ii) Log phase., (iii) Stationary phase., (iv) Death phase
4. (i) Lag phase., (ii) Stationary phase., (iii) Log phase., (iv) Death phase

Q. The population of an insect species shows an explosive increase in numbers during rainy season followed by its disappearance at the end of the season. What does this show ?

1. The population of its predators increases enormously
2. S - shaped or sigmoid growth of this insect
3. The food plants mature and die at the end of the rainy season
4. Its population growth curve is of J-type

Q. 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. When N/K is exactly one
2. When N nears the carrying capacity of the habitat
3. When N/K equals zero
4. When death rate is greater than birth rate