Understanding Biotic and Abiotic Factors

Which of the following is an example of a biotic factor in an ecosystem?

• Sunlight

• Water

• Plants

• Rocks

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Explain how biotic and abiotic factors interact in a forest ecosystem to support plant growth.

• Biotic factors like animals provide shade, while abiotic factors like sunlight and water are not needed.

• Biotic factors like plants use abiotic factors like sunlight and water for photosynthesis.

• Abiotic factors like rocks provide nutrients, while biotic factors like animals are not involved.

• Biotic factors like bacteria decompose abiotic factors like sunlight.

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Which of the following is an abiotic factor that can affect the temperature of an ecosystem?

• Trees

• Soil

• Wind

• Animals

Plan a simple experiment to investigate the effect of sunlight (an abiotic factor) on plant growth (a biotic factor).

• Place plants in a dark room and measure their height daily.

• Water plants with different amounts of water and record their growth.

• Place plants in areas with varying amounts of sunlight and measure their growth over time.

• Grow plants in different soil types and observe their color.

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Which of the following is NOT a biotic factor?

• Fungi

• Temperature

• Bacteria

• Insects

Describe how abiotic factors like water and temperature can influence the types of plants found in a desert ecosystem.

• High water levels and low temperatures allow for a wide variety of plants.

• Low water levels and high temperatures limit plant types to those that can conserve water.

• High water levels and high temperatures support only aquatic plants.

• Low water levels and low temperatures support only cold-resistant plants.

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Which of the following is a biotic factor that can affect the population of fish in a lake?

• Water pH

• Algae

• Temperature

• Salinity

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Analyze how changes in abiotic factors like temperature and rainfall can impact the biotic community in a rainforest.

• Increased temperature and rainfall will have no effect on the biotic community.

• Decreased temperature and rainfall can lead to a decrease in plant and animal diversity.

• Increased temperature and rainfall will only affect the abiotic factors.

• Decreased temperature and rainfall will increase plant growth.

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Which of the following is an example of an abiotic factor in a marine ecosystem?

• Fish

• Coral

• Salinity

• Seaweed

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Evaluate the impact of removing a biotic factor, such as a predator, from an ecosystem.

• It will have no impact on the ecosystem.

• It may lead to an increase in the prey population, affecting plant life and other species.

• It will only affect abiotic factors like temperature.

• It will cause all species to become extinct.

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