Which of the following hormones has the fewest targets?
A. Thyroid-stimulating hormone
B. Growth hormone
C. Testosterone
D. Oxytocin
E. Melatonin
Answer: A
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Based on your knowledge of hydrocarbon degradation, what factors most likely limited the rate of petroleum degradation after the Exxon Valdez oil spill off the coast of Alaska?
A) salt concentration B) temperature C) inorganic nutrient concentrations D) temperature and inorganic nutrient concentrations
Which of the following statements about mammalian cleavage is false?
A. The embryo increases in overall size during cleavage. B. It occurs more slowly than cleavage in other organisms. C. Early divisions do not occur at the same time. D. Zygotic transcription begins as early as the two-cell stage. E. Cell divisions extend completely through the egg.
The hierarchical system of nomenclature
a. allows diversity to be catalogued. b. organizes knowledge about species relationships. c. permits organisms to be identified. d. sorts organisms into groups. e. includes all of these
A leaf without a(n) blade is said to be sessile. Indicate whether the statement is true or false