Dan made the table shown to describe two different relationships between animals. Relationship a: One organism lives inside the organism it feeds off.
Relationship b: No organism is harmed.
Explain.

Which of the following is an example of a non-falsifiable hypothesis? a. there is a teacup orbiting the milky way galaxy. b. there is no life on mars. c. the human species started in africa. d. humans cannot live without the amino acid methionine

In this case, the statement that people who exercise for an hour may have lower cholesterol levels is .

Crossing over is a method of (blank)?