The correct answer is option D. 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.
In the experiment, a control should be present to compare the effect of the variable in the experiment. In the control sample, all the parameters except the variable should be same as the experimental group. In this way, the comparison of the effect of variable can be easily done in an experiment.
In this case, the variable is amount of carbon dioxide the plant receives. So, Stella should include a control group by placing the plant in the same container and leave it on atmospheric carbon dioxide supply, no extra carbon dioxide should be pumped into it. Also, the amount of water she give to each plant should be the same to maintain the water level as constant.
Answer:
294.1 minutes
Explanation:
5,882 seconds (98 minutes) to travel 2,000 km.
2,000 x 3 = 6,000
5,882 seconds x 3 = 17,646
(294.1 minutes) to travel 6,000 km
Answer:
DNA- contains instructions on how a cell functions
Nucleus- controls the activity of the cell
Cytoplasm- supports and protects the organelles in the cell.
Explanation:
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Answer:
C. transfers water into Earth’s oceans.
E. moves oxygen and carbon dioxide through the biosphere.
Explanation: Atmosphere has great effect on the movement of water. Due to evaporation, water that is present in the ocean is evaporated in the form of vapours and forming clouds. These clouds move to the hilly areas and falls in the form of rain. This water is used by both plants and animals.
Atmosphere moves oxygen and carbon dioxide through the biosphere. Carbondioxode is exhaled from animal's body to the atmosphere. This carbondioxode is used by plants in the process of photosynthesis and make their own food and oxygen is exhaled. This oxygen is used by the animals.
