Which of earth’s layer is a liquid?

Which of th following best describes how genes produce traits in an organism?

Need , i need a scenario of: artificial selectionmutationnon random mating

Which of the following statements best distinguishes a hypothesis from a theory? a. theories are hypotheses that have been proved. b.hypotheses are guesses; theories are correct answers c. hypotheses usually are relatively narrow in scope; theories have broad explanatory power. d. theories are proved to be true; hypotheses are often contradicted by experimental results.