An individual is constipated. They take magnesium salts to help loosen the stool. Why does this work?
A. Water moves from the intestines to the blood because the blood is hypertonic
B. Water moves from the blood to the intestines because the blood is hypotonic.
C. Water moves from the blood to the intestines because the blood is hypertonic
D. Water moves from the intestines to the blood because the blood is hypotonic.
Answer: B
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Staphylococcus aureus is a common foodborne disease, because it
A) grows on common foods. B) is present in some humans that work in food processing. C) produces several heat-stable enterotoxins. D) grows on many foods, is present in some humans that work in food processing, and produces several heat-stable enterotoxins.
A developing embryo has a deformity in the development of its muscles. What germ layer
might have carried a mutation that led to this deformity?
a. mesoderm b. endoderm c. ectoderm d. protoderm
The mycelium of a multicelled fungus is a mesh of filaments, each called a _____
Fill in the blank(s) with correct word
What causes the peaks in the prey population (i.e., what causes the prey population to stop increasing in size and start decreasing in size)?
a. Immigration of more predators. b. Disease process occurs that kills off more prey than in previous years. c. The prey is reproducing at a faster rate than predators. d. The prey is reproducing at the exact same rate that predators are removing prey.