Residual chlorine must be maintained in

A) anaerobic sludge digestion.
B) primary sewage treatment.
C) secondary sewage treatment.
D) tertiary sewage treatment.
E) water treatment.


E

Biology & Microbiology

You might also like to view...

Which organelle is enclosed by a double membrane?

a. ribosome b. nucleus c. lysosome d. peroxisome e. Golgi body

Biology & Microbiology

If tyrosine and isoleucine undergo condensation, the new bond that is formed is between the:a

oxygen of the R group and the hydrogen of the amino group. b. carbon of the R group and the nitrogen of the amino group. c. carbon of the carboxyl group and the hydrogen of the R group. d. carbon of the carboxyl group and the hydrogen of the amino group. e. carbon of the carboxyl group and the nitrogen of the amino group.

Biology & Microbiology

For humans and most vertebrates, the body is supported primarily by ____

a. an exoskeleton b. only nonskeletal structures c. a hydrostatic skeleton d. an endoskeleton e. joined exo- and endoskeletons

Biology & Microbiology

People with autism have lower levels of _____, a hormone that contributes to bonding behavior in other mammals

a. oxytocin b. prolactin c. estrogen d. LH

Biology & Microbiology