Ecological Principles - iCEV

What is a food chain?

• A circular pattern of energy flow in an ecosystem.

• A linear sequence of organisms through which nutrients and energy pass as one organism eats another.

• A network of food webs that shows the interconnections between species.

• A method of food production in agriculture.

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What is the Clean Water Act?

• A U.S. federal law enacted in 1948 aimed at regulating the discharge of pollutants into the waters of the United States and regulating quality standards for surface waters.

• A state law that focuses on the management of solid waste and recycling programs.

• A federal law that promotes the use of renewable energy sources in the United States.

• An international treaty aimed at protecting marine biodiversity.

Define biodiversity.

• Biodiversity refers to the variety of life in a particular habitat or ecosystem, including the number of different species, genetic diversity, and ecosystem diversity.

• Biodiversity is the total number of organisms in a specific area, regardless of species.

• Biodiversity is the study of how different species interact with each other in an ecosystem.

• Biodiversity refers to the number of individuals of a single species in a habitat.

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What is the significance of the water cycle?

• It is essential for regulating climate and supporting plant growth.

• It has no impact on life on Earth.

• It only affects ocean currents and tides.

• It is primarily important for industrial processes.

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What is a wetland biome?

• A land area that is saturated with water and supports aquatic plants, such as marshes, swamps, and bogs.

• A dry area with little vegetation and high temperatures.

• A mountainous region with high elevation and cold temperatures.

• A forested area that receives heavy rainfall throughout the year.

Which organisms are known to conduct nitrogen fixation?

• Nitrogen-fixing bacteria, certain plants like peanuts, and some algae.

• Only legumes and certain fungi.

• All types of bacteria and viruses.

• Only algae and aquatic plants.

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What are the main components of an ecosystem?

• Producers (plants), consumers (animals), and decomposers (fungi and bacteria)

• Only plants and animals

• Only decomposers and consumers

• Producers, only

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What is an ecological niche?

• A type of ecosystem where species coexist

• The role and position a species has in its environment, including all interactions with biotic and abiotic factors.

• A method of measuring biodiversity in an area

• A specific habitat where a species is found

What is the role of chlorophyll in photosynthesis?

• Chlorophyll absorbs light energy from the sun, which is used to convert carbon dioxide and water into glucose and oxygen.

• Chlorophyll helps in the absorption of nutrients from the soil.

• Chlorophyll protects the plant from harmful UV rays.

• Chlorophyll is responsible for the plant's structural support.

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What is the impact of pollution on ecosystems?

• Pollution can enhance biodiversity and promote ecological balance.

• Pollution can harm ecosystems by contaminating air, water, and soil, leading to loss of biodiversity, health issues in organisms, and disruption of ecological balance.

• Pollution has no significant effect on ecosystems.

• Pollution only affects human health and not the environment.

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