Bony fish evolved ________ to help keep them afloat.
Fill in the blank(s) with the appropriate word(s).
swim bladders
Bony fish evolved swim bladders to help keep them afloat.
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You decide to go on vacation in the mountains, where you are staying in a cabin. Unfortunately, when you turn on the water in the cabin you smell hydrogen sulfide (H2S) gas. After some research, you find out that the H2S may be due to the presence of sulfur bacteria living in your pipes. What molecule do these bacteria use as an electron acceptor?
A. O2 B. H20 C. SO4 D. H2S
An individual whose resident normal microbiota overgrows the other indigenous organisms resulting in disease may be a result of:
a. the patient has received antibiotic treat-ment killing off some of the protective resident microbiota. b. become immunocompromised or unable to fight off infection in normal conditions. c. maybe suffering from a debilitating dis-ease resulting in a decreased balance be-tween normal microbiota and pathogenic organisms. d. all of the scenarios are potentially asso-ciated with the development of disease.
Hemophilia A is an X-linked recessive disorder. If a normal man marries a woman who is a carrier, what fraction of their sons will have hemophilia? Select one:
a. 0% b. 75% c. 50% d. 100% e. 25%
The resting potential across a typical neuron membrane is approximately ____ inside relative to outside.
A. ?70 microvolts B. ?70 millivolts C. ?70 volts D. +70 millivolts E. +70 megavolts