Cytokines
A. play key roles in both specific and nonspecific immunity.
B. play key roles in both specific and non-specific immunity and are required for regulation of the immune response.
C. are required for regulation of the immune response.
D. cause lysis of invading microorganisms.
Answer: B
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________ are organisms that are unable to regulate their body temperature.
Fill in the blank(s) with the appropriate word(s).
The highest level of the hierarchical classification of life is the ____
a. biosphere b. domain c. ecosystem d. population e. cell
Fertilization leading to a viable pregnancy in mammals occurs in the
a. ovary. b. uterus. c. vagina. d. oviduct. e. follicle.
Assume that a man who carries an X-linked gene has children. Assuming normal meiosis and random combination of gametes, the man would pass this gene to ________
A) all of his daughters B) half of his sons C) half of his daughters D) all of his sons E) all of his children