Where does a dendritic cell present antigen to naive T cells?
a. thymus
b. blood
c. bone marrow
d. lymph node or spleen
e. interstitial fluid
d
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The most medically important bacteria sought in the medical laboratory are cultivated using incubators with temperatures maintained in what range?
a. 35°C to 37°C b. 30°C to 35°C c. 37°C to 39°C d. 25°C to 35°C
Which of the followings substance is NOT
secreted by an exocrine gland?
a. mucus b. hormones c. tears d. earwax e. digestive enzymes
Nitrifying bacteria convert
a. ammonia to nitrite and nitrate. b. nitrate to nitrite to nitrogen gas. c. nitrate to ammonia. d. urea to ammonia. e. ammonia to urea.
Most primary producers are plants that generate simple, high-energy carbohydrates through the process of photosynthesis
This biochemical event essentially captures sunlight and uses the energy to fuel pathways that lead to the production of useful products. How are plants able to capture sunlight to initiate this process?