Which of the following is the most serious effect of water pollution for humans?
a. infectious diseases
b. algal blooms
c. toxic food chain effects
d. low-oxygen water select the best answer from the choices provided a b c d

When data collected on the performance of a healthcare facility suggests that quality standards have not been met, what is one method that can be used to correct the problem?

Why would a person’s self-esteem affect his or her health?

Which of the following processes within viral replication is the greatest source of genetic variation in rna virus populations? a) high mutation rate due to lack of proofreading of rna genome replication errors. b) transcription from the host cell rna polymerase introduces numerous mutations. c) capsid proteins from the host cell can replace the viral capsid. d) viral rna is translated by host cell ribosomes.