How did scientists obtain environmental DNA (eDNA) from carp in the waterways near Chicago? OA. They collected carp eggs, from which they extracted DNA.
B. They captured carp and extracted DNA directly from the fish.
O C. They extracted DNA directly from the wastes of the fish.
OD. They collected water samples and isolated DNA the fish had left behind.

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

What types of energy transfers and energy transportations are involved in the domino chain reaction?

How is the carbon cycle related to global warming ?