How does a digested nutrient enter the bloodstream?

A) through a series of large pores in the duodenum
B) through tiny blood vessels inside the microvilli
C) through the liver
D) through small openings in the epithelium of the stomach


B

Biology & Microbiology

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The most common infectious disease in humans is ________.

A. dental caries B. diarrhea C. pharyngitis D. the common cold E. gastritis

Biology & Microbiology

Which of the following is most likely the cause

of the current extinction crisis? a. asteroid impact b. human activity c. adaptive radiation d. tectonic activity e. climate change

Biology & Microbiology

Explain why annotation is an important step in genomic sequencing projects, in the context of the percentage of the

human genome composed of coding regions. What will be an ideal response?

Biology & Microbiology

In a survey of Dall mountain sheep in Denali National Park in Alaska, researchers found that wolves preyed primarily on the most vulnerable members of the population, the young and the old. What conclusion is best supported by this data?

A. Dall mountain sheep in Denali are an r-selected population. B. A program should be established to cull the wolf population. C. A program should be established to cull the sheep population. D. Wolf predation is not dramatically reducing the sheep population. E. The wolf population is at its carrying capacity, so it is no threat to the sheep population.

Biology & Microbiology