Fungi and ________ are the main decomposers in the biosphere.
A. animals
B. protists
C. bacteria
D. plants
Answer: C
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Which of the following is the best definition of autoimmune disease?
A) a condition in which B cells and T cells respond independently to antigens and do not interact correctly B) a condition in which the adaptive immune system fails to recognize the second infection by the same antigen C) a condition in which self molecules are treated as non-self D) a condition in which the immune system creates random antibodies without being triggered by an antigen
In a developing human embryo, the hands and feet resemble mittens, with cells and tissues present between the fingers and toes. When a baby is born, these cells are not present, resulting in distinct fingers and toes. In the development of fingers and toes these cells were lost by ____.
A. cell connections B. cell migration C. apoptosis D. cell division E. cell morphology
In the experiment involving bluegill sunfish and their choice of diet, when equal numbers of small,
medium, and large Daphnia are present,
a. the sunfish prefer small Daphnia. b. the sunfish prefer medium Daphnia. c. the sunfish prefer large Daphnia. d. the sunfish show no preference. e. sunfish do not consume Daphnia.
Select the correct statement regarding the temperature response of the immune system.
A. When macrophages encounter invading cells, they release immunoglobulin-1, which is carried to the brain by the circulatory system. B. Interleukin-1 is a pyrogen, which can cause the neurons in the hypothalamus to raise the body's temperature, producing a fever. C. Fever contributes to the body's defenses by stimulating hyperhidrosis and causing the liver and spleen to store magnesium. D. Fevers above 99° F are often fatal.