All living things contain six key elements (or atoms). Which element is not part of this list?
A. carbon
B. nitrogen
C. hydrogen
D. helium
E. phosphorus
F. sulfur
Answer: D
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One reason protein needs increase during pregnancy is to:
a. provide extra plasma proteins. b. spare carbohydrates for use as energy. c. allow for adequate fat storage to support lactation. d. ensure sufficient essential fatty acids.
A typical cell contains "powerhouses," which is another name for ____
a. DNA b. ribosomes c. mitochondria d. electron transport chains e. RNA
What percentage of salt is composed of chloride?
A) 10% B) 80% C) 60% D) 50%
Which of the following children is most likely to be iron deficient?
a. A white male who plays soccer. b. A Mexican–American male living above the poverty threshold. c. A Native American female from a middle-class family. d. An African-American female living below the poverty threshold.