Scientists have discovered a new species of animal. Which would provide the best basis for classifying this new species?
A. DNA comparison
B. diet of animal
C. habitat of animal
D. appearance of animal
Answer: A. DNA comparison
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Which hormone is correctly paired with its action?
A) oxytocin â€" stimulates uterine contractions during childbirth B) thyroxine â€" affects biological rhythms, seasonal reproduction C) insulin â€" stimulates glycogen breakdown in the liver D) adrenocorticotropic hormone (ACTH) â€" stimulates metabolic processes E) melatonin â€" stimulates the release of glucocorticoids by the adrenal cortex
Snow geese usually select mates of their own color, an example of ____
a. genetic drift b. founder effects c. population bottlenecks d. nonrandom mating e. random mating
Which of the following is true concerning
white muscle fibers and red muscle fibers?
a. white muscle fibers have more mitochondria b. red muscle fibers have no myoglobin c. white muscle fibers make ATP by aerobic respiration d. red muscle fibers fatigue less easily e. red muscle fibers get most of their ATP thanks to creatine phosphate
Preganglionic motor neurons of the ________ division of the nervous system originate in the thoracic and lumbar regions of the spinal cord
A) sympathetic B) parasympathetic C) central nervous system D) paralumbar E) cerebral cortex