The pathogenic cause of disease is called the _____ agent.
A) mortality
B) etiological
C) prevalence
D) none of the above
Ans: B) etiological
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Which type of medium typically contains an indicator dye?
A) selective but not differential B) differential but not selective C) both selective and differential D) neither selective nor differential
Mutations that change the configuration of a protein at a specific temperature are called ____ mutations
A. Neutral B. Beneficial C. Deleterious D. Conditional
All EXCEPT which of the following is true about
chlamydia? a. Forty percent of those persons infected are between ages 15 and 19. b. One in ten sexually active teenage girls is infected. c. Most infected males are undiagnosed because they have no symptoms. d. Many untreated females develop PID. e. Untreated males risk infertility.
Which of the following are important in breaking down organic material in fertile topsoil?
A) rock particles B) humus and cations C) bacteria and fungi D) plant roots