Brownian motion keeps the molecules moving so that they can go from areas of higher concentration to areas of lower concentration, until equilibrium is reached.
This is known as the pericardium
Answer:
Cilia /flagella aids in movement.
Explanation:
Cilia and flagella helps in cellular movement.Bacteria contain flagella which helps in the propelling of bacteria towards nutrients or away from the waste materials.On the other hand cilia are threadlike appendages that helps in the attachment of bacteria to solid surface.
In human body respiratory system contain cilia which help to move mucus ,dust,germs and polens out of the body.
The tail of human sperm contain flagella which helps in the in the swimming of sperm inside the ovary in search of an egg.
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.
