Which atomic particle has no charge and is located in the nucleus?
A. neutron
B. electron
C. isotope
D. ion
E. proton
Answer: A
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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 cortex of Mr. Johnson's brain. B. auditory nerve leading to Mr. Johnson's brain. C. hair cells in the cochlea. D. tympanum or the bones of the middle ear. E. fluid of the cochlea.
A small population of Dutch settled in South
Africa in the 17th century and became known as Afrikaners. By chance, a few Dutch settlers carried the gene for Huntington’s disease. Today Huntington’s disease occurs at a relatively high frequency in this population. This is an example of
a. the bottleneck effect. b. the founder effect. c. gene flow. d. the Red Queen effect. e. natural selection.
Insulin promotes the storage of glucose via all of the following methods except:a
stimulating protein synthesis. b. reducing the use of fatty acids as fuel. c. promoting the liver to release glucose. d. stimulating fatty acid storage in adipose tissue. e. stimulating glycogen formation.
In support of the Recent Africa Origin hypothesis, the oldest dated fossils of H. sapiens found in Africa are reliably
dated at 100,000 years old. ____________________ Indicate whether the statement is true or false.