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.

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step 1 ammonium can be absorbed by plants, but some is converted into nitrates which are better for plants to absorb. this is called nitrification. 2. step 2 the deer eats the plants and uses the nitrogen-containing proteins for cell growth. 3. step 3 bacteria in the soil conduct nitrogen fixation to convert nitrogen gas from the atmosphere into ammonium. 4. step 4 some of the nitrates are absorbed back into plants, but denitrification breaks down the nitrates into nitrogen gas released back into the atmosphere. 5. step 5 nitrogen is found in the urine, which gets broken down into ammonium through the process of ammonification. 6. step 6 plants absorb the ammonium and begin assimilation, the process to add the nitrogen to protein.

the "power" of a lens is its resolution power, or its ability to distinguish between to closely located points. with the low power lens, it is likely you will see the rough form of the hay and maybe some movement of dots around the hay. however, when observed with the high power lens, the detailed features of the hay become visible and the microbes being grown are more clearly visible.

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her next move would be to use agarose gel electrophoresis to separate the dna molecules of varying length and create a dna fingerprint.