Answer:
what are the options
the only thing i can think of without seeing the options is Competition from other animals.
Explanation:
Answer:
Pulmonary artery
Explanation:
The pulmonary artery delivers oxygen poor blood to the lungs that comes from the right ventricle of the heart. The pulmonary artery is also the only artery in the body that carries unoxugenated blood. When the blood goes to the lungs, it picks up oxygen and drops off carbon dioxide to be expelled from the body. The pulmonary vein then takes the oxygen-rich blood and brings it back to the heart.
Answer:
Despite the availability of cleaner energy sources, most of the energy used to power American homes comes from the
burning of fossil fuels such as coal and oil. The burning of fossil fuels releases carbon dioxide into the air. Carbon dioxide
is a greenhouse gas that contributes to climate change.
Why do you think it's a challenge to reduce fossil fuel usage in homes in the United States? How could the use of fossil
fuels affect the biodiversity in neighborhoods and the surrounding ecosystems?
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Part B: Conduct Background Research
Research is the first step in engin
............................ In this case, the statement that people who exercise for an hoour may have lower cholesterol level is HYPOTHESIS. ....................... The cholesterol level would be the DEPENDENT VARIABLE.
An hypothesis refer to a proposed statement based on prior knowledge, which is used as a starting point in scientific experimentation.
In scientific experiments, there are always two variables, independent and the dependent variable. The independent variable is the variable that is changed or controlled in a scientific experiment in order to determine its effects on the dependent variable.<span />
