Biology: Population Dynamics and Ecosystems

How do predators affect prey populations?

• Predators help control prey populations, preventing overpopulation and resource depletion.

• Predators increase the number of prey by providing food sources.

• Predators have no significant impact on prey populations.

• Predators only affect the size of the prey's habitat.

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What is the impact of habitat destruction on species diversity?

• Habitat destruction leads to an increase in species diversity.

• Habitat destruction has no impact on species diversity.

• Habitat destruction leads to a decline in species diversity and can result in extinction.

• Habitat destruction only affects plant species, not animals.

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Why do smaller population sizes in fragmented habitats lead to extinction?

• Gene flow is restricted and inbreeding occurs.

• Larger territories are available for smaller populations.

• Smaller populations have more genetic diversity.

• Fragmented habitats provide more resources for survival.

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What is the difference between primary and secondary succession?

• Primary succession occurs in lifeless areas, while secondary succession occurs in areas where a disturbance has destroyed an existing community.

• Primary succession occurs in areas with existing vegetation, while secondary succession occurs in lifeless areas.

• Primary succession is a rapid process, while secondary succession takes a long time to occur.

• Primary succession involves the re-establishment of a community after a fire, while secondary succession does not.

What is the significance of biodiversity in ecosystems?

• Biodiversity enhances ecosystem productivity and stability.

• Biodiversity decreases competition among species.

• Biodiversity leads to increased pollution levels.

• Biodiversity reduces the resilience of ecosystems.

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What happens when a population reaches carrying capacity?

• Growth & Immigration are equal to Death & Emigration.

• Population growth continues indefinitely.

• Resources become unlimited for the population.

• The population will migrate to a new area.

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What happens to the carrying capacity if food or resources increase?

• The carrying capacity decreases.

• The carrying capacity remains the same.

• The carrying capacity increases.

• The carrying capacity fluctuates.

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Explain the concept of ecological succession.

• Ecological succession is the process by which ecosystems change and develop over time.

• Ecological succession is the immediate response of an ecosystem to a disturbance.

• Ecological succession refers to the extinction of species in an ecosystem.

• Ecological succession is the process of creating new species in an ecosystem.

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What is the difference between immigration and emigration?

• Immigration is the movement of individuals into a population, while emigration is the movement of individuals out of a population.

• Immigration is the movement of individuals out of a population, while emigration is the movement of individuals into a population.

• Immigration and emigration refer to the same process of moving individuals between populations.

• Immigration is the process of individuals moving within a population, while emigration is the process of individuals moving to a different country.

Define mutualism in ecological terms.

• Mutualism is a relationship where one species benefits at the expense of another.

• Mutualism is a symbiotic relationship where both species benefit.

• Mutualism is a type of competition between two species for resources.

• Mutualism is a relationship where both species are harmed.

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