a cause and effect relationship is implied when evidence of a true cause and effect relationship has not been established. How do we establish a contributory cause of disease? Going beyond a group association, what other requirements establish cause?

Choose thyroid, parathyroid, or the adrenal gland and choose one disease affecting this part of the en-docrine system.

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.

What kind of traffic sign is a red triangle with a white center? a. stop b. yield c. wrong way d. do not enter