The most common source of infectious diseases in water supplies is
a. algal blooms
b. sewage
c. surface runoff
d. none of the above
which of the following is not a reason that nonnative species are reared outside their native ecosystems?
a. they are commercially important.
b. they are used to replace native species.
c. they are used for restocking programs.
d. none of the above

Ireally need to know this answer asap

Saved if you often notice flakes of dead skin on your shirt, you may have dandruff. if so,

If scientists are trying to use what they know about hsv to devise a means of protecting other people from being infected, which of the following would have the best chance of lowering the number of new cases of infection? a) vaccinate of all persons with preexisting cases of hsvb) interfere with new viral replication in preexisting cases of hsvc) treat hsv lesions to shorten the breakoutd) educate people about avoiding sources of infection