Read the passage about plankton algae.%0D%0A%0D%0APlankton algae are microscopic algae that live in water. In a healthy pond ecosystem, plankton algae can be beneficial. They are fed on by zooplankton which, in turn, become food for fish. Plankton algae can grow rapidly when they are supplied with nutrients such as nitrogen and phosphorous. When fertilizer runs off from a farmer's field into a nearby pond, the extra nutrients can cause the plankton algae to grow too quickly and form a bloom. The bloom of algae can cover the entire surface of the pond.%0D%0A%0D%0AWhich two arguments correctly predict an effect of an algal bloom on the pond ecosystem?%0D%0A%0D%0A a%0D%0AThe temperature of the water will begin to increase.%0D%0A b%0D%0AThe fish population will increase with the added nutrients.%0D%0A c%0D%0AThe amount of carbon dioxide in the pond water will be lower.%0D%0A d%0D%0AThe underwater plants will not receive enough sunlight to grow.%0D%0A e%0D%0AThe amount of oxygen in the pond water will be lower.

Answer 1

The correct predictions of the effect of an algal bloom on the pond ecosystem are:

d - The underwater plants will not receive enough sunlight to grow.

e - The amount of oxygen in the pond water will be lower.

Algal blooms can block sunlight from reaching underwater plants, causing them to die off. As the algae bloom dies and decomposes, it consumes oxygen in the water, leading to lower oxygen levels which can harm fish and other aquatic life.