Which one of the following is the smallest unit of matter that has all the properties of an element?
a. molecule
b. proton
c. atom
d. compound
e. electron
Ans: c. atom
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mtDNA contains all of the genes necessary for the complete function of mitochondrial metabolism
Indicate whether the statement is true or false
Invertebrates have an adaptive immune and an innate immune system
a. True b. False
How does stomach acid assist the innate immune system?
a. The acid signals B cells to the site of infection. b. The acid signals T cells to the site of infection. c. The acid creates an inhospitable environment for pathogens to live. d. The acid breaks down the food sources, and the pathogen starves.
Which of the following may result in muscular weakness?
a. deficiencies in phosphorus and calcium b. deficiencies in iodine and iron c. deficiencies in iron and manganese d. deficiencies in phosphorus and potassium