Lymphatic tissues include all of the following except:a
tonsils.
b. lymph nodes.
c. parotid gland.
d. spleen.
e. thymus.
C
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Cross-bridges form between the contractile proteins of the muscle cell. The movement of cross-bridges shortens the muscle fiber. What two proteins participate in cross-bridge formation?
A. actin and myosin B. troponin and titin C. titin and myosin D. titin and actin
The anterior pituitary hormone that promotes milk production is called __________
Fill in the blank(s) with the appropriate word(s)
A newly mated queen ant establishes an ant nest in an unoccupied patch of suitable habitat. Assuming that no disasters strike the nest, which of the following types of equation will best describe its population growth?
A) linear B) quadratic C) logarithmic D) logistic E) exponential
Griffith, a British microbiologist, used bacteria and mice to demonstrate the process of transformation. During transformation,
A. a bacterial chromosome produces an exact copy of itself. B. the nucleus of a mouse cell repairs itself when damaged by bacterial infection. C. a bacterial cell is transformed into a spore during unsuitable environmental conditions. D. DNA from an infected mouse cell changes bacteria from a nonpathogenic to a pathogenic form. E. genetic material is transferred from one bacterial cell to another.