What causes fever?
A) Macrophages release pyrogens, which cause body temperature to increase.
B) Complementary proteins coat the surfaces of microbes and cause an increase in their temperature.
C) The activity of B cells and T cells causes the body to give off more heat.
D) Damaged cells release histamine, which increases body temperature.
A
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The waxy substance on leaf surfaces is the:
A. cuticle. B. stomata. C. epidermis. D. leaf hair. E. mesophyll.
__________ are aquatic heterotrophs and autotrophs with a cellulose covering. Fill in the blank(s) with the appropriate word(s)
How many of these species probably have a cell wall that consists partly of an outer membrane of lipopolysaccharide?
A) only one species B) two species C) three species D) four species
What is different between two versions of the same gene?
A. Their location. For example, one version might be at the end of one chromosome, while the other version is in the middle of another chromosome. B. The chromosome number they are on. For example, one version might be on chromosome 12, while the other one is on chromosome 3. C. The information they carry. For example, one version might carry the information for blue eye pigment, while the other carries the information for brown eye pigment. D. The cell they are in. For example, one might be in a liver cell, while the other is in a blood cell.