Hemoglobin is <span>a red protein responsible for transporting oxygen in the blood of vertebrates. Its molecule comprises four subunits, each containing an iron atom bound to a heme group</span>
Answer:
A.
first line of defense
Explanation:
The first line of defense acts to prevent external substances from entering the body hence sneezing out the pollen acts to expel the pollen from entering his windpipe thus is the first line of defense.
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Answer:
55% male; 72%.
Explanation:
55% male and 72% females are the percentage of teens who engaged in sexual activity wished they had waited for longer time period. In the year 2012, 53 percent of the male respondents wish they would have waited longer, whereas the percentage for the female respondents to more than 67 percent wished they had waited for longer time period fordoing sextual activity.
The answer that makes the most sense is b
