After the first exposure to an antigen, a ________ stimulates growth and multiplication of antigen-reaction cells

A) secondary innate immune response
B) primary adaptive immune response
C) phagocytic immune response
D) hyperactive cytotoxic response


Answer: B

Biology & Microbiology

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Cell differentiation occurs due to ____

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Which model would predict the abrupt appearance of a new species in the fossil record, with little or no evidence of

intermediate forms? a. anagenesis b. gradualism c. microevolution d. paedomorphosis e. punctuated equilibrium

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What are lichens?

A) A symbiotic association of algae and fungi B) A symbiotic association of algae and Archaea C) Algae D) Archaea E) Fungi

Biology & Microbiology

The physical characteristics of an organism, or its ________, are determined by its genetic makeup, referred to as its ________

Fill in the blank(s) with correct word

Biology & Microbiology