Answer: C. Grow the tree in a pot and measure the mass of the soil before and after the tree grows to a certain height
Explanation: When testing an hypothesis, which is a prediction of the outcome of an experiment, it is vital to keep all other factors, that can affect the outcome of the experiment, constant; so that any outcome can be attributed (or disregarded) to the variable being tested.
In this case, the variable being tested is the soil, and so all other factors such as water, air, sunlight, etc. should be kept constant.
Answer:
Like the coronavirus, the SARS outbreak originated in China and spread throughout the rest of the world.
Explanation:
I think it was to cultivate tobacco
Rome and Greece both had a major impact on the architecture of Western civilization
Karl Marx was an influential German thinker and revolutionary who pioneered the idea of Communism. Communism is a social, political, economical, and philosophical idea which has the absence of social classes, money, and the state in the society. Communist societies has two social class: the working class and the capitalist class.
