Name two similarities between macrophages and dendritic cells
What will be an ideal response?
Macrophages and dendritic cells use phagocytosis to clear invaders. They also activate the adaptive branch of immunity.
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The most common etiologic agent of septic arthritis accounting for approximately 70% of infections is:
a. Streptococcus pyogenes. b. H. influenzae. c. S. aureus. d. Streptococcus mitis.
The inability of a man to produce LH would result in
A. the inability of Leydig cells to produce testosterone. B. the inability of the anterior pituitary to produce FSH. C. the loss of positive feedback control on FSH release. D. decreased GnRH production by the hypothalamus. E. exaggerated secondary sex characteristics.
Primary succession takes much longer than secondary succession because it involves
A. more time for development of a seed bank. B. colonization by more K-selected species. C. colonization by organisms that are farther away. D. time for development of the soil. E. redevelopment of the atmospheric gases.
In this drawing of a chloroplast, which structure represents the thylakoid membrane?
A) structure A
B) structure B
C) structure C
D) structure D