Which is mismatched?
A. sodium hypochlorite-chlorine
B. formalin-formaldehyde
C. iodophor-iodine
D. chlorhexidine-alcohol
E. benzalkoniumchloride-quaternary ammonium compound
Answer: D
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The molecule shown above is the purine ____
a. thymine b. adenine c. uracil d. guanine e. cytosine
The dog (Canis familiaris) genome has recently been sequenced. About how many of the dog's genes are shared with humans?
What will be an ideal response?
Tortoises in the Galápagos possessed neck lengths unique to each island. Neck lengths appear to be an adaptation to which selective agent?
A. reproductive barriers used to produce offspring B. ease in finding pools of drinking water C. type of vegetation available to eat D. male competition for females E. defense against predators
Why do snakes flick their tongue when they see potential prey?
A. They are trying to bring scent molecules into the mouth so the Jacobson's organs can decipher them. B. Snakes use tongue flicking as a means of communication. C. They are trying to detect the various scent molecules with their tongue. D. All of the choices are correct.