Eloda Plant

John believes the water plant Elodea will produce more oxygen when placed closer to a light source. He places four Elodea plants of the same height at varying distances from a lamp: 1 meter, 2 meters, 3 meters, and 4 meters. The plants are in identical aquariums with a beaker placed over each plant. The oxygen content inside the beaker is measured after each plant sits for 8 hours.

Which question best describes John's experiment?

• Does the amount of oxygen affect the amount of light needed by the plant?

• Does a plant produce more oxygen when it is placed closer to a light source?

• How does the type of plant affect the oxygen produced when placed by a lamp?

• Will the light affect how much the Elodea plant grows when placed in the light?

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What part of the plant is ?

• leaves

• stem

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What is the primary function of the Elodea plant in an aquatic ecosystem?

• Oxygen production through photosynthesis

• Nitrogen fixation

• Carbon dioxide absorption

• Providing shade for fish

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Which of the following conditions is most likely to affect the rate of photosynthesis in Elodea plants?

• Amount of sunlight

• Type of soil

• Presence of fish

• Water temperature

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In an experiment, Elodea plants are placed in water with different pH levels. What is the likely outcome?

• Photosynthesis rate changes

• Plant height increases

• Leaf color changes

• Root length increases

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What gas is primarily released by Elodea plants during photosynthesis?

• Oxygen

• Carbon dioxide

• Nitrogen

• Hydrogen

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How does the Elodea plant contribute to the oxygen levels in an aquarium?

• By releasing oxygen during photosynthesis

• By absorbing carbon dioxide

• By decomposing organic matter

• By providing nutrients to fish

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Which part of the Elodea plant is primarily responsible for photosynthesis?

• Leaves

• Roots

• Stem

• Flowers

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What happens to Elodea plants when they are placed in a dark environment?

• Photosynthesis stops

• Oxygen production increases

• Growth rate increases

• Leaves turn blue

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Why are Elodea plants often used in biology experiments?

• They are easy to grow and observe

• They produce colorful flowers

• They require special nutrients

• They are resistant to diseases