Humans tend to settle??? A. where fossil fuels are abundant
B. in regions of high biodiversity
C. in regions rich in resources we need to survive (ex. fertile land, water)

D. where it is hot and dry throughout the year

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

25. what does meiosis create? haploids or diploid? somatic cells or gametes?

Environmental impacts on evolution : mastery test