Which of the following hypotheses can be successfully

Which of the following hypotheses can be successfully tested?

Snails were the first organisms on Earth to produce energy (ATP) through cellular respiration.

Plants were the first organisms on Earth to produce food (carbohydrates) through photosynthesis.

Cellular respiration and photosynthesis cannot occur in a closed biological system without each other.

Carbon dioxide is consumed by Elodea plants and produced by snails.

Elodea plants will increase the carbon dioxide concentration released by snails.

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Question 22 pts

Hypothesis: The Elodea plants will perform photosynthesis and cellular respiration when placed in light and will only perform cellular respiration when placed in the dark.

What is the dependent variable to test this hypothesis?

amount of carbon dioxide present

amount of oxygen present

number of Elodea plants

number of snails

amount of light

color of bromthymol blue

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Question 32 pts

Hypothesis: The Elodea plants will perform photosynthesis and cellular respiration when placed in light and will only perform cellular respiration when placed in the dark.

What is the independent variable to test this hypothesis?

amount of carbon dioxide present

amount of oxygen present

number of Elodea plants

number of snails

amount of light

color of bromthymol blue

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Question 42 pts

Hypothesis: The Elodea plants will perform photosynthesis and cellular respiration when placed in light and will only perform cellular respiration when placed in the dark.

How is the dependent variable measured to test this hypothesis?

amount of carbon dioxide present

amount of oxygen present

number of Elodea plants

number of snails

amount of light

color of bromthymol blue

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Question 52 pts

Hypothesis: The Elodea plants will perform photosynthesis and cellular respiration when placed in light and will only perform cellular respiration when placed in the dark.

What is the control to test this hypothesis?

Elodea plants in the dark

Elodea plants in the light

Elodea plants with snails

Elodea plants without snails

bromthymol blue without plants or snails

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Question 62 pts

Hypothesis: If snails are present, then they will release carbon dioxide which the Elodea will take in.

What is the dependent variable to test this hypothesis?

amount of carbon dioxide present

amount of oxygen present

number of Elodea plants

number of snails

amount of light

color of bromthymol blue

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Question 72 pts

Hypothesis: If snails are present, then they will release carbon dioxide which the Elodea will take in.

What is the independent variable to test this hypothesis?

amount of carbon dioxide present

amount of oxygen present

number of Elodea plants

number of snails

amount of light

color of bromthymol blue

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Question 82 pts

Hypothesis: If snails are present, then they will release carbon dioxide which the Elodea will take in.

What is the control to test this hypothesis?

Elodea plants in the dark

Elodea plants in the light

Elodea plants with snails

Elodea plants without snails

bromthymol blue without plants or snails

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Question 92 pts

What would you conclude if the color of the bromthymol blue solution changed in your control tube?

error occurred in experiment and needs to be repeated

hypothesis was rejected by the experimental results

hypothesis was supported by the experimental results

experiment is not repeatable

hypothesis is flawed

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Question 102 pts

Without snails present, you observed carbon dioxide production of Elodea plants in the the light and dark. What can you conclude from these results?

Elodea plants do photosynthesis in the light and dark.

Elodea plants do cellular respiration in the light and dark.

Elodea plants require animals to obtain carbon dioxide for photosynthesis.

Elodea plants require animals to obtain carbon dioxide for cellular respiration.

Error occurred and the experiment needs to be repeated.