Tag: growth rates and conditions for growth

Quizzes (0) Questions (32)

Questions Related to growth rates and conditions for growth

Multiple choice biology plant growth growth rates and conditions for growth population ecology growth and development

Fastest phase of S-shaped growth curve is

  1. Lag phase

  2. Log Phase

  3. Stationary phase

  4. Both (a) and (B).
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

  • S-shaped logistic growth curve includes 3 phases:
  • Lag phase - When some organisms are introduced in an area, the population growth begins slowly.
  • Log phase - The conditions are ideal and the maximum growth rate is reached.
  • Stationary phase - Growth rate begins to slow down as factors such as food, water and space become limiting.
Thus, the correct answer is 'Log phase.'

Multiple choice biology plant growth growth rates and conditions for growth population ecology growth and development

Most realistic growth curve is

  1. J-shaped

  2. Sigmoid

  3. Parabolic

  4. Both (A) & (B)
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

The resources for the growth of most animal population are finite and become limiting sooner or later, thus the logistic growth model is considered more realistic. The equation for model gives a sigmoid shaped graph when plotted against the N in relation to time.  The equation is :

dN/dT=rN(K-N/K) 
where, 
N is Population density at time t
r is the intrinsic rate of natural increase 
K is carrying capacity.
So, the correct answer to the question is 'Sigmoid'.

Multiple choice biology plant growth growth rates and conditions for growth population ecology growth and development

Most realistic growth curve 

  1. J shaped

  2. Sigmoid

  3. Parabolic

  4. Bith A and B
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation
The resources for the growth of most animal population are finite and become limiting sooner or later, thus the logistic growth model is considered more realistic. The equation for model gives a sigmoid shaped graph when plotted against the N in relation to time.  
The equation is :
$\dfrac{dN}{dT}$ = $rN$ $\dfrac{(K-N)}{K}$ 
where, 
N is Population density at time t
r is the intrinsic rate of natural increase 
K is carrying capacity.
So, the correct answer to the question is 'Sigmoid'.
Multiple choice biology plant growth growth rates and conditions for growth population ecology growth and development

In growth curve, maximum growth occurs during

  1. Lag phase

  2. Senescent phase

  3. Decline phase

  4. Exponential phase
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation
Bacterial growth is divided into four phases, namely lag phase, exponential phase, stationary phase and decline phase. In lag phase, there is very little or no bacterial growth. In this phase, bacteria are adjusting to the environment and synthesizing biochemicals and nutrients. In log phase, the number of bacterial cells doubles at an exponential rate. The maximum growth phase is the exponential phase. In stationary phase, the rate of cell death is equal to the rate of cell division. In decline phase, there is the decrease in the bacterial population due to lack of nutrients and high toxin concentration.
Thus, the correct answer is option D.
Multiple choice biology plant growth growth rates and conditions for growth population ecology growth and development

Process, container is being emptied into collection vehicles at point of collection is known as:

  1. Hauled Container System

  2. Stationary Container System

  3. Collection System

  4. Pulverization
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

In a stationary container system, the collection vehicle travels to the site, empties the container, and moves to the next, whereas in a hauled container system, the entire container is removed.