During which response to the antigen do we display a latent period of no secretory antibody synthesis?
A. Primary
B. Tertiary
C. Quaternary
D. Secondary
Answer: A
Biology & Microbiology
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a. the circulatory system b. the respiratory surface c. mitochondria d. the respiratory medium e. blood
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If a disease attacked this type of white blood cell, a person would no longer be able to mobilize his or her specific defenses
A) plasma cells B) helper T cells C) cytotoxic T lymphocytes D) B lymphocytes
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The single greatest threat to biodiversity comes from ________
A) habitat destruction and fragmentation B) invasive species C) overexploitation D) pollution
Biology & Microbiology
In a wind-pollinated species, which of these floral parts is likely to be inconspicuous or absent?
A. pistils B. stamens C. stigmas D. petals E. receptacle
Biology & Microbiology