Question

test name: bio_usad2_u02_fy20
test id: 3645093

1. noah claims the \a\ trial was exposed to the intense light, while mateo thinks \a\ was in the darkness. which students claim and reasoning is correct?

a mateo is correct. plants store light to photosynthesize; in the dark, oxygen use would increase.
b mateo is incorrect. plants substitute oxygen for energy in the dark; this would decrease the oxygen in the water.
c noah is correct. oxygen is a product of photosynthesis; intense light would increase the amount of oxygen in the water.
d noah is incorrect. plants use oxygen during photosynthesis; intense light would decrease the amount of oxygen in the water.

1. which conclusion below is best supported by the data in the graph?

a plants can only use cellular respiration if they are in the dark.
b plants can only carry out photosynthesis if there is sunlight all the time.
c plants can either use photosynthesis or cellular respiration but not both at the same time.
d plants can switch between cellular respiration and photosynthesis in changing conditions.

1. what should mateo and noah do next to improve their investigation?

a change the intensity of the light.
b conduct the same experiment several more times.
c have another group follow their procedures with different plants.
d change the length of time the plants are exposed to light or darkness.

Explanation:

For question 20, oxygen is a product of photosynthesis and intense light promotes photosynthesis, increasing oxygen in water, so Noah is correct. For question 21, plants can perform both cellular respiration and photosynthesis depending on conditions. For question 22, repeating the same experiment multiple times helps improve reliability.

Answer:

1. C. Noah is correct. Oxygen is a product of photosynthesis; intense light would increase the amount of oxygen in the water.
2. D. Plants can switch between cellular respiration and photosynthesis in changing conditions.
3. B. Conduct the same experiment several more times.