Organisms and Populations
Mizoram Board · Class 12 · Biology
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What is the term used for the maximum number of individuals that a habitat can support?
In exponential growth, the population grows in a _______ pattern.
The intrinsic rate of natural increase is represented by which symbol?
In which type of interaction do both species benefit?
Sample Questions
Which of the following are examples of population attributes? (Select all correct answers)
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Birth rate, Death rate, Sex ratio, Age distribution
Population attributes are characteristics that apply only to groups, not individuals. Birth rate, death rate, sex ratio, and age distribution are all population-level attributes. Individual height is a characteristic of an individual organism, not a population attribute.
Which factors contribute to an increase in population density? (Select all correct answers)
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Natality, Immigration
Population density increases due to natality (births) and immigration (individuals moving into the habitat). Mortality (deaths) and emigration (individuals leaving the habitat) decrease population density.
The age pyramid of a growing population has a _______ shape.
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Broad base
A growing population has many young individuals, creating a broad base in the age pyramid. A narrow base indicates a declining population, while equal width suggests a stable population.
Cuscuta is an example of which type of parasite?
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Ectoparasite
Cuscuta is a parasitic plant that grows on the external surface of host plants, making it an ectoparasite. Endoparasites live inside the host body, while brood parasites lay eggs in other species' nests.
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