Blood agar is both a differential and enriched medium.
Answer the following statement true (T) or false (F)
True
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Interleukins (aka: cytokines) perform all of the
following functions EXCEPT a. stimulate inflammation. b. directly kill pathogens. c. stimulate T and B cell proliferation. d. activate natural killer cells. e. stimulate fever.
Artificially constructed movement corridors
A) increase inbreeding. B) reduce dispersal. C) can be harmful because they allow for the spread of disease. D) can be harmful because they create isolated habitats.
Answer the following questions true (T) or false (F)
1. The spleen is a primary lymphoid tissue. 2. Eosinophil granules contain diverse enzymes and antimicrobial toxins that are released into surrounding tissues in response to certain allergens and parasites. 3. Dendritic cells prevent the immune system from attacking self and from over-reacting to nonthreatening substances.
Why do we require a separate set of theories for the origin as compared to the maintenance of sexual reproduction?
a. The benefits or costs of sexual reproduction were not realized until a fully functional system of sexual reproduction was in place. b. Extant asexual organisms had sexual ancestors. c. Origin and maintenance require different explanations by philosophical ne-cessity different explanations. d. Sex may have evolved multiple times. e. A and B.