Water that enters the digestive system is absorbed into body tissues through the ____.
A. stomach
B. pancreas
C. small intestine
D. lymph vascular system
E. large intestine
Answer: C
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The inducer for the E. coli lac operon is allolactose produced by the action of permease on lactose.
Answer the following statement true (T) or false (F)
The genome of retroviruses is made of
A. ssDNA. B. dsDNA. C. ssRNA. D. dsRNA.
What breathing abnormalities can occur in neonatal mammals exposed to nicotine?
a. reduced ventilator output. b. increased duration of apneas. c. SIDS. d. reduced ventilator output and increased duration of apneas. e. reduced ventilator output, increased duration of apneas and SIDS.
What are some of the similarities and differences between DNA and RNA?
Soap and detergent molecules have a long, hydrophobic tail and a polar, hydrophilic head. They are sometimes referred to as bridge molecules because they allow oils and fats to be suspended and dissolved in water (which they otherwise would not be able to do). Imagine that you are using soap to wash away dirt that is being held against your skin in an oily film.