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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
The cattle egret and grazing cattle in close association is a classic example of ______.
Identify the interspecific interaction which one species is benefited and other is neither banned nor benefited.
Which of the following is TRUE for amensalism?
A protozoan living in the digestive tract of a flea that lives on a dog is an example of ______
Give one example for the following type.
Phytophagous animal
While living in and on the host species, the animal parasite has evolved certain adaptations. Describe these adaptations with examples.
Match the Column I with Column II.
| Column I | Column II |
| A. Lichen | (i) Commensalism |
| B. Shark and Pilot fish | (ii) Mutualism |
| C. Barnacles on the back of a whale | (iii) Symbiotic obligatory relationship |
| D. Sharks and dolphins | (iv) Competition |
Interspecific interaction could be ______.
Statement I: Gause’s competitive exclusion principle states that two closely related species competing for different resources cannot exist indefinitely.
Statement II: According to Gause’s principle, during competition, the inferior will be eliminated. This may be true if resources are limiting.
In the light of the above statements, choose the correct answer from the options given below:
In the sign convention for population interactions, what does the symbol '+' represent?
