The arrival of ________ in the duodenum triggers the release of bile by the gallbladder.
A. vitamins
B. fats
C. minerals
D. carbohydrates
E. protein
Answer: B
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In genetics, a chi-square test can be used to determine ____
a. whether an organism with a dominant phenotype is homozygous or heterozygous b. whether an allele exhibits complete or incomplete dominance c. what the predicted outcome of a dihybrid cross will be d. how closely actual results of a cross match the expected results e. whether a trait is determined by one gene or many genes
The zone of soil that surrounds the roots and contains a variety of organic exudates is called the
A. mycorrhizae. B. rootsphere. C. rhizosphere. D. geosmin.
The ciliary muscle
A. controls the shape of the lens to maintain a clear image of focus at various distances. B. is the part of the eye that contains rods, cones, and bipolar cells. C. is extremely sensitive to light and responsible for night vision. D. is the internal part of the cochlea with hair cells that are stimulated by sound waves. E. is the part of the inner ear that recognizes rotational equilibrium.
Most marine invertebrates are osmoconformers. This means that
A. that their body fluids contain the exact same solutes in the same concentration as their cells. B. that their body fluids contain the exact same solutes in the same concentration as their surroundings. C. the osmolarity of their body fluids is the same as their seawater environment. D. the osmolarity of their body fluids fluctuates between hypertonic to hypotonic depending on the season and the tides. E. the osmolarity of their body fluids is equal to that of the osmoregulators who inhabit the same environments.