Select the correct answer. Why do the Arctic and the Antarctic experience extremely cold climates? A. because these regions receive cooling winds throughout the year B. because these regions are filled with flat grasslands C. because these regions receive heavy rainfall throughout the year D. because these regions are at a great distance from the equator

Which of the following statements is true about body composition? a. body composition is the percentage of fat to lean body mass. b. body composition is a measure of one's body weight. c. body composition is a measure of one's essential body fat. d. body composition is not a good indicator of overall health. select the best answer from the choices provided. a

If you are having a hard time lifting something, you should arch your back. a. true b. false

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.