Because the foods eaten by animals are often composed largely of macromolecules, animals need to have mechanisms for _____
A) dehydration synthesis
B) enzymatic hydrolysis
C) regurgitation
D) demineralization
B
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Ecology and environmentalism are the same scientific discipline.
Answer the following statement true (T) or false (F)
Which of the following is not true regarding Entamoeba histolytica?
A. Entamoeba histolytica cysts pass through the stomach unharmed. B. Entamoeba histolytica produces enzymes that degrade epithelial tissue. C. Entamoeba histolytica always remains in the intestinal tract during an infection. D. Entamoeba histolytica grazes on bacteria in the intestines.
Which of the following is TRUE when comparing solutions with a pH of 6 and a pH of 8?
A. The solution with a pH of 8 has a 100 times higher concentration of hydrogen ions than a solution with a pH of 6. B. The solution with a pH of 8 has a 2 times higher concentration of hydrogen ions than a solution with a pH of 6. C. The solution with a pH of 8 has a 100 times lower concentration of hydrogen ions than a solution with a pH of 6. D. The solution with a pH of 8 has a 2 times lower concentration of hydrogen ions than a solution with a pH of 6. E. The hydrogen ion concentration does not appreciably differ between a solution with a pH of 8 versus that with a pH of 6.
The three main regions of the human small intestine proceeding in sequence from the stomach to the large intestine are
A. duodenum, ileum, and jejunum. B. ileum, duodenum, and jejunum. C. ileum, jejunum, and duodenum. D. jejunum, ileum, and duodenum. E. duodenum, jejunum, and ileum.