Stella wants to test the hypothesis “if carbon dioxide levels increase, the growth rate of sunflowers will increase.” she places five young sunflower plants into similar containers and sets up pumps that release different amounts of carbon dioxide into each container. she plans to measure the daily height of the plants for two weeks and graph the data. which additional considerations would produce the most reliable experimental results? she should also provide mist to each of the plants to keep the air moist and fertilize the plants. she should record her data in a bar graph for easy analysis. she should increase her sample size to 50 plants and place them all in the same area. the plants receiving less co2 should be given a little more water. she should be sure to give all the flowers the same amount of water. she should make observations twice a day for four weeks for better results. she should place one flower in a similar container, but not pump carbon dioxide into it. she should also give each plant the same amount of water.

The other considerations would be:

For reliability of any experiment:

There should be a considerable number of observations. For example, 50 plants would be better as compared to 5 plants.

There must be a control specimen with one can compare results. For example, one plant must be kept in a similar container but no carbon dioxide should be pumped into it.

In addition, all variables other than carbon dioxide must be kept the same or constant. For example, each flower should get an equal amount of water.

Lastly, for better results, she can record observation twice a day and for four years instead of two weeks.

a adaptation is when organism changes itself to fit the environment

ex. when its cold outside i wear a jacket

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the correct option is option d