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- Describe in detail about ecosystems and how it work.
- The concept of biotic and abiotic factors and their interactions.
- Growth models and growth curve (Expoential growth model and logistic growth model)
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Ecology is the branch of biology which mainly involves the study about the interactions among organisms and their environment. Basically, there are four levels of biological organization.
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- Organisms.
- Populations.
- Communities.
- Biomes.
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Population growth refers to the increase in the number of individuals in a population. This depends on various factors such as weather, food availability, predator pressure, etc. The population density changes due to the following factors:
- Natality: The number of births in a population in a given time period.
- Mortality: The number of deaths in a population in a given time period.
- Emigration: The number of individuals who moved to some other habitat in a certain time period.
- Immigration: The number of individuals who have come into the habitat from elsewhere in a certain period of time.
Population Growth Models
The population growth models include:
- Exponential Growth: In the limited supply of food, the population follows an exponential growth.
- Logistic Growth: When the resources are finite and become limited sooner or later, the population growth is said to be logistic.
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