Which method is used to prevent hemolytic newborn disease?
a. EPO injections
b. Rh transfusions
c. Rh antibody injections
d. cross-matching
e. RhoGam injections
ANSWER: e
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Which of the following is NOT a typical cellular change that occurs during lung cancer?
A. cellular hyperplasia B. loss of ciliated cells C. cellular displasia D. elevated gas transport E. increases in basal cell number and thickening of epithelium
A three-base sequence, found on the bottom loop of tRNA, that is complementary to a sequence of three bases in mRNA is a(n)
A. terminator. B. amino acid attachment site. C. promoter. D. codon. E. anticodon.
Along with clay, why are sand and silt needed in soil for proper plant growth?
1.Sand contains micronutrients that the plant needs for growth. 2.Sand and silt are negatively charged and thus bind nutrients in soil. 3.Sand and silt separate the clay particles to allow air in. 4.Sand and silt can expand when they absorb water, allowing moisture retention in soil.
Approximately 10—15% of insect species harbor bacteria that make needed nutrients available to the insects. How might you classify these bacteria?
A) phytoplankton B) extremophiles C) exotoxins D) endosymbionts