Which cardiovascular structures in the fetus shunt blood away from the fetal lungs?
A) foramen ovale and ductus arteriosus
B) foramen magnum and ductus venosus
C) foramen ovale and ductus venosus
D) umbilical artery and umbilical vein
E) umbilical artery and ductus venosus
A
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A plant cell with three sets of chromosomes has a ploidy that is
a. haploid. b. diploid. c. triploid. d. tetraploid. e. hexaploid.
Which of the following is a water mold that
was responsible for the Irish famine in the mid- 1800s?
a. Phytophthora b. Plasmodium c. E. coli d. Staphylococcus e. Trichomonas
Which of the following substances functions in the body's inflammatory response to prevent blood clots, regulate body temperature, and open airways to the lungs?
A) carotenoids B) prostaglandins C) leukotrienes D) melatonin
Which of the following best explains why a particular atom may not form compounds easily?
A) The atom has an uneven number of protons. B) The atom's outer energy shells are completely full. C) The atom has seven electrons in its outer shell. D) The atom has no electrons.