At about what point in gestation can an ultrasound exam determine the sex of the fetus?
A) about 4 weeks after fertilization
B) at the end of the first trimester
C) about 20 weeks after fertilization
D) at the end of the second trimester
B
Biology & Microbiology
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Which of these diseases would most likely be identified by viewing a stained blood smear in a light microscope?
A. Ebola hemorrhagic fever B. Dengue fever C. HIV D. Chagas disease
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Why is nitrogen necessary in the human body?
What will be an ideal response?
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In the classic argument of ‘nature vs. nurture’,
nature would most correspond with:a. genes. b. environment. c. divine intervention. d. environment and genes. e. genes, environment, and genes
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When speciation occurs, the result is usually a dramatic change in appearance in the new species
Indicate whether the statement is true or false
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