A redox reaction involves the transfer of
A) oxygen.
B) water.
C) an electron.
D) a proton
Answer: C
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Altruism can be distinguished from reciprocal altruism because altruism is defined as ____ but
reciprocal altruism involves ____.
a. the sacrifice of an individual's reproductive success to help others; the expectation of a future favor in return for present aid b. aid given to nonrelatives; benefits given to close relatives only c. the expectation of a future favor in return for present aid; close relatives helping each other d. low-risk behavior that provides minor benefits to others; high-risk behavior providing major benefits to others e. aid given to relatives; benefits given to nonrelatives only
Select the statement that most accurately describes the action of antimicrobial drugs today.
A. The development of antiviral drug resistance has not been observed, as compared to the high rate of antibiotic resistance seen today. B. Effective antiviral drugs have a long history of development and use. C. Antiviral drug treatment is more effective than vaccination against a viral disease. D. Antiviral drugs often result in toxic side effects due to their inhibition of host cell activity.
Mr. Johnson was becoming slightly deaf. To test his hearing, his doctor held a vibrating tuning fork tightly against Mr. Johnson's jaw. This sent vibrations through the bones of the skull, setting the fluid in the cochlea in motion. Mr. Johnson could hear the tuning fork this way, but not when it was held away from the skull a few inches from his ear. His hearing problem is most likely attributed to the
A. auditory nerve leading to Mr. Johnson's brain. B. fluid of the cochlea. C. auditory cortex of Mr. Johnson's brain. D. hair cells in the cochlea. E. tympanum or the bones of the middle ear.
________ carry a signal across the synapse between two adjacent nerve cells
Fill in the blank with correct word.