Which is an example of a physical change?

(a) wood rots
(b) a nail rusts
(c) gasoline ignites
(d) water evaporates

Which conditions need to be in balance for cells to function? check all that apply. blood sugar food intake body water body temperature body mass

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

Explain how ancient whale fossils found in eqypt are believed to support the theory of evolution.