Which of the following statements regarding coliform bacteria is correct?
A. Coliforms derive from the intestinal tract and therefore indicate fecal contamination.
B. Petri dishes used to enumerate coliforms are best incubated at 45-48°C.
C. The presence of Klebsiella is a strong indicator of fecal contamination.
D. Coliforms from the human and bovine GI tracts differ, so identifying the specific microbe will indicate the source of contamination.
Answer: A
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Goiters are often produced in the ____ , a gland that plays a key role in metabolism by secreting the thyroxine and triiodothyronine hormones
Fill in the blank with the appropriate word.
Which of the following organs or tissues can use glycerol and fatty acids as energy sources during the postabsorptive period?
A. heart B. skeletal muscles like the bicep C. brain D. heart and skeletal muscles E. skeletal muscles and brain
Four of the five items listed below are
chloroplast features. Select the exception. a. stroma b. granum c. microbody d. pigment e. ATP
Variation among individuals that is due to variation in factors other than environmental influences is called ________
A) phenotypic variation B) genetic variation C) broad-sense heritability D) narrow-sense heritability