How much daily physical activity is recommended by the centers of disease control and prevention? 25 minutes a day 45 minutes a day 30 minutes a day 60 minutes a day

The lower respiratory system includes the a. lungs. b. esophogus. c. larynx. d. pharynx

How could natural selection best be used to explain the evolution of the white fur of arctic fox

Which of the following statements describes the lysogenic cycle of lambda (λ) phage? a) after infection, the viral genes immediately turn the host cell into a lambda-producing factory, and the host cell then lyses.b) most of the prophage genes are activated by the product of a particular prophage gene.c) the phage genome replicates along with the host genome.d) the phage dna is copied and exits the cell as a phage.