A thick filament is made up of ________
A) actin
B) myosin
C) sarcomere
D) actin and myosin
B
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The majority of human infections with Campylobacter species are caused by:
a. direct contact with carriers of the bacte-rium. b. contamination of food, milk, or water with animal feces. c. multiplication of the organism in food products. d. direct contact with persons infected with the bacterium.
The virus originally used for vaccination against smallpox is named
A. vaccinia. B. cowpox. C. rubella. D. herpes.
A few photosynthetic dinoflagellate species are endosymbionts in cells of reef-building corals
What does the dinoflagellate provide to the host coral?
1.Oxygen and carbon dioxide 2.Oxygen and sugar 3.Protection from ultraviolet light 4.Protection from predatorsThe body’s first line of defense includes all of the
following EXCEPT a. intact skin. b. linings of body cavities. c. complement. d. chemical protection. e. resident populations of microbes.