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प्रश्न
Explain any three important characteristics of population.
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उत्तर
Some important characteristics of population are:
- Population density: Density of a population is the total number of individuals in that population present per unit area at a specific time.
- Natality: Natality is the birth rate of a population.
- Mortality: Mortality is the death rate of a population.
संबंधित प्रश्न
Define the following term:
Interspecific competition
What is Mortality? What are its two types?
Explain different population interactions with examples.
Identify the interspecific interaction in which species A is harmed and species B is unaffected.
______ is the adaptation of an organism i which it matches its colour with its surroundings to get protected from predators.
Which population interaction can be represented by'+''-'?
Which one of the following is NOT an example of mutualism?
Lianas are vascular plants rooted in the ground and maintain erectness of their stem by making use of other trees for support. They do not maintain direct relation with those trees. Discuss the type of association the lianas have with the trees.
Observe the graph given below.
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The graph represents inter-specific interaction between two species of Paramecia competing for the same resource in a culture medium. Paramecium caudatum and Paramecium aurelia were grown in separate cultures as well as in mixed cultures. It was found that each species grew in numbers according to the logistic equation.
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a) Which species is competitively superior? Support it with the data provided in the graph.
b) State the underlying principle for the above result and name the scientist associated with this principle.
c) Explain the mechanism in which two or more species competing with each other can co-exist.
OR
Graphs A and B shown below depict interaction of two species. Which graph indicates Mutualism? Give reason.
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| A | B |
Statement I: Gause’s ‘Competitive Exclusion Principle states that two closely related species competing for the same resources cannot co-exist indefinitely and competitively inferior one will be eliminated eventually.
Statement II: In general, carnivores are more adversely affected by competition than herbivores.
In the light of the above statements, choose the correct answer from the options given below:
