The two stages which make up the process of photosynthesis are the light reactions and the
cycle.

Researchers randomly divide participants into groups. each group takes a different amount of omega-3 fatty acid supplements daily for a month. one group receives a placebo. the researchers measure the impact on cholesterol levels in the blood. what is the purpose of random assignment in this experiment? a, to produce treatment groups with similar characteristics b, to ensure that all people with high cholesterol have an equal chance of being selected for the study c, to increase the accuracy of the research results and prevent skewness in the data

In general, characteristics that an organism survive and reproduce become more common over time. what mechanism of evolution causes this?

2. which is the last step in the scientific method?