ACT Science Practice Tests 3 – Research Summary

ACT Science Practice Tests 3 – Research Summary

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25/02/2024

  • Total Question : 6
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  • 1)

    Allergic diseases have a large impact on human health globally, with 10–30% of the population affected by allergic rhinitis and more than 300 million affected by asthma. Pollen from grass species, which are highly allergenic and occur worldwide, elicits allergic responses in 20% of the general population and 40% of atopic individuals.

    Scientists examined the effects of elevated levels of two greenhouse gases, carbon dioxide (CO2), a growth and reproductive stimulator of plants, and ozone (O3), a repressor, on pollen and allergen production in Timothy grass (Phleum pratense L.)

    Experiment 1

    Researchers treated Timothy grass under two conditions. First, they used 30 ppb ambient level of ozone and observed the change in pollen production by the plant. Then, they placed the same plant by elevating the level of ozone to 80 ppb and observed the behavior of the plant with respect to pollen production. For both the experiments level of Carbon dioxide was the same, only ozone levels were altered. Following graph shows what was observed by the researchers under both the conditions.

    Experiment 2

    The same plant was then observed for any change in the allergen production. The findings of the researchers are depicted in the chart below. Here, the dotted line shows elevated level whereas solid line reflects the ambient level of ozone gas.

     

    Which of the following statement is true about the experiment 1?

    Your Answer : Not attemptedCorrect Answer : Both B and D
  • 2)

    Allergic diseases have a large impact on human health globally, with 10–30% of the population affected by allergic rhinitis and more than 300 million affected by asthma. Pollen from grass species, which are highly allergenic and occur worldwide, elicits allergic responses in 20% of the general population and 40% of atopic individuals.

    Scientists examined the effects of elevated levels of two greenhouse gases, carbon dioxide (CO2), a growth and reproductive stimulator of plants, and ozone (O3), a repressor, on pollen and allergen production in Timothy grass (Phleum pratense L.)

    Experiment 1

    Researchers treated Timothy grass under two conditions. First, they used 30 ppb ambient level of ozone and observed the change in pollen production by the plant. Then, they placed the same plant by elevating the level of ozone to 80 ppb and observed the behavior of the plant with respect to pollen production. For both the experiments level of Carbon dioxide was the same, only ozone levels were altered. Following graph shows what was observed by the researchers under both the conditions.

    Experiment 2

    The same plant was then observed for any change in the allergen production. The findings of the researchers are depicted in the chart below. Here, the dotted line shows elevated level whereas solid line reflects the ambient level of ozone gas.

    How much pollen production reduces when ambient level of ozone is replaced by the elevated level?

    Your Answer : Not attemptedCorrect Answer : 37%
  • 3)

    Allergic diseases have a large impact on human health globally, with 10–30% of the population affected by allergic rhinitis and more than 300 million affected by asthma. Pollen from grass species, which are highly allergenic and occur worldwide, elicits allergic responses in 20% of the general population and 40% of atopic individuals.

    Scientists examined the effects of elevated levels of two greenhouse gases, carbon dioxide (CO2), a growth and reproductive stimulator of plants, and ozone (O3), a repressor, on pollen and allergen production in Timothy grass (Phleum pratense L.)

    Experiment 1

    Researchers treated Timothy grass under two conditions. First, they used 30 ppb ambient level of ozone and observed the change in pollen production by the plant. Then, they placed the same plant by elevating the level of ozone to 80 ppb and observed the behavior of the plant with respect to pollen production. For both the experiments level of Carbon dioxide was the same, only ozone levels were altered. Following graph shows what was observed by the researchers under both the conditions.

    Experiment 2

    The same plant was then observed for any change in the allergen production. The findings of the researchers are depicted in the chart below. Here, the dotted line shows elevated level whereas solid line reflects the ambient level of ozone gas.

     

    Which of the following statement is the best conclusion for the Experiment 1?

    Your Answer : Not attemptedCorrect Answer : Ozone can be harmful as it can significantly enhance the pollen production of Timothy grass regardless of the ambient or elevated levels.
  • 4)

    Allergic diseases have a large impact on human health globally, with 10–30% of the population affected by allergic rhinitis and more than 300 million affected by asthma. Pollen from grass species, which are highly allergenic and occur worldwide, elicits allergic responses in 20% of the general population and 40% of atopic individuals.

    Scientists examined the effects of elevated levels of two greenhouse gases, carbon dioxide (CO2), a growth and reproductive stimulator of plants, and ozone (O3), a repressor, on pollen and allergen production in Timothy grass (Phleum pratense L.)

    Experiment 1

    Researchers treated Timothy grass under two conditions. First, they used 30 ppb ambient level of ozone and observed the change in pollen production by the plant. Then, they placed the same plant by elevating the level of ozone to 80 ppb and observed the behavior of the plant with respect to pollen production. For both the experiments level of Carbon dioxide was the same, only ozone levels were altered. Following graph shows what was observed by the researchers under both the conditions.

    Experiment 2

    The same plant was then observed for any change in the allergen production. The findings of the researchers are depicted in the chart below. Here, the dotted line shows elevated level whereas solid line reflects the ambient level of ozone gas.

     

    Which of the following statements is true about the experiment 2?

    Your Answer : Not attemptedCorrect Answer : Both ambient and elevated level of ozone increase the allergen production.
  • 5)

    Allergic diseases have a large impact on human health globally, with 10–30% of the population affected by allergic rhinitis and more than 300 million affected by asthma. Pollen from grass species, which are highly allergenic and occur worldwide, elicits allergic responses in 20% of the general population and 40% of atopic individuals.

    Scientists examined the effects of elevated levels of two greenhouse gases, carbon dioxide (CO2), a growth and reproductive stimulator of plants, and ozone (O3), a repressor, on pollen and allergen production in Timothy grass (Phleum pratense L.)

    Experiment 1

    Researchers treated Timothy grass under two conditions. First, they used 30 ppb ambient level of ozone and observed the change in pollen production by the plant. Then, they placed the same plant by elevating the level of ozone to 80 ppb and observed the behavior of the plant with respect to pollen production. For both the experiments level of Carbon dioxide was the same, only ozone levels were altered. Following graph shows what was observed by the researchers under both the conditions.

    Experiment 2

    The same plant was then observed for any change in the allergen production. The findings of the researchers are depicted in the chart below. Here, the dotted line shows elevated level whereas solid line reflects the ambient level of ozone gas.

     

    How much does allergen production elevate the level of ozone produces less than the ambient level?

    Your Answer : Not attemptedCorrect Answer : 143%
  • 6)

    Allergic diseases have a large impact on human health globally, with 10–30% of the population affected by allergic rhinitis and more than 300 million affected by asthma. Pollen from grass species, which are highly allergenic and occur worldwide, elicits allergic responses in 20% of the general population and 40% of atopic individuals.

    Scientists examined the effects of elevated levels of two greenhouse gases, carbon dioxide (CO2), a growth and reproductive stimulator of plants, and ozone (O3), a repressor, on pollen and allergen production in Timothy grass (Phleum pratense L.)

    Experiment 1

    Researchers treated Timothy grass under two conditions. First, they used 30 ppb ambient level of ozone and observed the change in pollen production by the plant. Then, they placed the same plant by elevating the level of ozone to 80 ppb and observed the behavior of the plant with respect to pollen production. For both the experiments level of Carbon dioxide was the same, only ozone levels were altered. Following graph shows what was observed by the researchers under both the conditions.

    Experiment 2

    The same plant was then observed for any change in the allergen production. The findings of the researchers are depicted in the chart below. Here, the dotted line shows elevated level whereas solid line reflects the ambient level of ozone gas.

     

    Which of the following statement best reflects the conclusion drawn from experiment 2?

    Your Answer : Not attemptedCorrect Answer : Both levels of ozone gas increase the allergen production.

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