These substances are known as reactant
Answer:
D. Collect a large sample number
Explanation:
With a larger sample number, that means that more people participated and gave the correct answer. If you constantly change the variable, the answer may always be the same but because of the variable you changed.
Answer:
There are both natural and human sources of carbon dioxide emissions. Natural sources include decomposition, ocean release and respiration. Human sources come from activities like cement production, deforestation as well as the burning of fossil fuels like coal, oil and natural gas.
Explanation:
The correct answer is epithelial
Epithelial lines the cavities and organs, as well as the skin. The other remaining ones are muscle, which builds muscles, nervous, which builds the nervous system, and connective, that connects joints or similar things.
Answer:
Tobacco effects the body in ways such as, unhealthy teeth, heart problems, premature aging of the skin, blood clots, and in some cases yellowing of fingertips.
Explanation: