Which type of cell acts an antigen-presenting cell?
a. neutrophils
b. helper T cells
c. cytotoxic T cells
d. plasma cells
e. dendritic cells
ANSWER: e
Biology & Microbiology
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The first step of PCR is called annealing
A. true B. false
Biology & Microbiology
Flower parts are borne on the tip of a stalk referred to as the:a
calyx. b. corolla. c. filament. d. receptacle. e. stigma.
Biology & Microbiology
The type of tissue illustrated in the accompanying figure is:
a. elastic connective tissue.
b. simple squamous epithelium.
c. pseudostratified epithelium.
d. cartilage.
e. adipose tissue
Biology & Microbiology
In females at puberty, what cells begin to secrete the major female sex hormone estradiol?
A. oocyte cells B. granulosa cells C. corpus luteum D. follicle cells
Biology & Microbiology