According to the serial endosymbiosis hypothesis, the ancestors of mitochondria are thought to be

purple bacteria.
____________________ Indicate whether the statement is true or false.


T

Biology & Microbiology

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The function of valves in the heart is to

a. form blood cells. b. participate in immunity. c. prevent backflow of blood. d. prevent clot formation. e. push blood ahead.

Biology & Microbiology

Which division of the nervous system is divided into two opposing systems that control smooth muscles and glands?

a. autonomic b. somatic c. afferent d. central nervous system e. voluntary nervous system

Biology & Microbiology

Peripheral proteins are linked to either surface of the plasma membrane by:

a. covalent disulfide bonds. b. associating with fatty acids through hydrophobic interactions. c. embedding in one side of the membrane and, thus, not extending through to the other side. d. associating with glycoproteins on the inner membrane surface. e. bonding to integral proteins through noncovalent interactions

Biology & Microbiology

In the theory for allergic desensitization, which immunoglobulin blocks the allergen from binding with IgE?

A. IgG B. IgM C. IgE D. IgD E. IgA

Biology & Microbiology