If a child has two genes for blonde hair (one from each parent), his genotype is said to be
a. dominant.
b. homozygous.
c. recessive.
d. heterozygous

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

Diffusion and osmosis are forms of passive transport

What are some natural processes that represent physical and chemical changes?