Biology Ecosystem

What is the role of decomposers in the biogeochemical cycles?

• Decomposers break down organic matter and release nutrients back into the environment.

• Decomposers have no role in biogeochemical cycles

• Decomposers contribute to the accumulation of organic matter

• Decomposers absorb nutrients from the environment

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Explain the difference between a food chain and a food web.

• A food chain is a web of interconnected organisms, while a food web is a linear sequence of organisms.

• A food chain is a linear sequence of organisms, while a food web is a more complex network of interconnected food chains.

• A food chain is more complex than a food web.

• A food chain involves only producers, while a food web involves only consumers.

Describe the process of primary succession in an ecosystem.

• Primary succession occurs only in aquatic ecosystems

• The process of primary succession in an ecosystem involves the colonization of pioneer species on bare rock or sand, which gradually leads to the development of a stable ecosystem with complex plants and trees.

• The process of primary succession involves the introduction of non-native species to an ecosystem

• Primary succession leads to the immediate development of a stable ecosystem without any pioneer species

Why is biodiversity important for the health of an ecosystem?

• Ecosystem services are not affected by biodiversity

• Biodiversity has no impact on the productivity of an ecosystem

• Biodiversity provides resilience, supports ecosystem services, and contributes to stability and productivity.

• Biodiversity leads to ecosystem imbalance and instability

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What factors can affect the population dynamics of a species?

• Availability of food and resources, predation, competition, disease, natural disasters, and human activities

• Climate change and global warming

• Social media influence

• Alien invasion

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How does the carbon cycle contribute to the balance of gases in the atmosphere?

• The carbon cycle helps regulate the levels of carbon dioxide in the atmosphere, thus contributing to the balance of gases.

• The carbon cycle has no impact on the balance of gases in the atmosphere

• The carbon cycle only contributes to the imbalance of gases in the atmosphere

• The carbon cycle only affects the levels of oxygen in the atmosphere

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Give an example of a producer in a food chain and explain its role.

• A lion, which preys on other animals in the food chain

• A chef, who cooks the food for the animals in the food chain

• A rock, which has no role in the food chain

• An example of a producer in a food chain is a plant. Its role is to convert sunlight into energy through photosynthesis, providing food and energy for the rest of the food chain.

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What are the different stages of ecological succession?

• Primary succession and secondary succession

• Initial succession and final succession

• First succession and last succession

• Early succession and late succession

Explain the concept of genetic diversity in relation to biodiversity.

• Biodiversity is not influenced by genetic diversity

• Genetic diversity only affects individual organisms, not entire populations

• Genetic diversity has no impact on biodiversity

• Genetic diversity is important for biodiversity as it allows species to adapt to changing environments and helps maintain healthy populations.

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How does the carrying capacity of an ecosystem affect population growth?

• The carrying capacity of an ecosystem has no impact on population growth

• The carrying capacity of an ecosystem increases population growth exponentially

• The carrying capacity of an ecosystem only affects the size of individual organisms, not the population as a whole

• The carrying capacity of an ecosystem limits the population growth by providing a maximum sustainable population size.

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