Which the following is NOT a requirement for natural selection to occur in a population? there must be differential reproductive success there must be variation in the population there must be only one allele for the trait in question the variation in the population must be heritable

Stem cells found adult tissue such as in bone marrow brain muscle skin and liver are only capable of what

Both destructive and constructive, the natural event seen here, is important in destroying and creating landforms on earth. what is this event called? a) deposition b) flooding c) landslide d) sedimentation

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.