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The logistic population growth is expressed by the equation

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Important Questions on Organisms and Populations

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Alpha Question Bank for Medical: Biology>Chapter 35 - Organisms and Populations>Exercise-3>Q 22
People who have migrated from the planes to an area adjoining Rohtang Pass about six months back
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Alpha Question Bank for Medical: Biology>Chapter 35 - Organisms and Populations>Exercise-3>Q 46
Cuscuta is an example of
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Alpha Question Bank for Medical: Biology>Chapter 35 - Organisms and Populations>Exercise-4>Q 34
A sedentary sea anemone gets attached to the shell lining of the hermit crab. The association is 
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Alpha Question Bank for Medical: Biology>Chapter 35 - Organisms and Populations>Exercise-4>Q 35
A biologist studied the population of rats in a barn. He found that the average natality was 250, average mortality 240, immigration 20 and emigration 30.
The net increase in population is
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Alpha Question Bank for Medical: Biology>Chapter 35 - Organisms and Populations>Exercise-4>Q 36

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

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Alpha Question Bank for Medical: Biology>Chapter 35 - Organisms and Populations>Exercise-4>Q 37
When does the growth rate of a population following the logistic model equal zero? The logistic model is given as dN/dt=rN1-N/K
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Alpha Question Bank for Medical: Biology>Chapter 35 - Organisms and Populations>Exercise-4>Q 38
Gause's principle of competitive exclusion states that
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Alpha Question Bank for Medical: Biology>Chapter 35 - Organisms and Populations>Exercise-4>Q 39
Which of the following is correct for r-selected species?