Changes in an organism’s genome that have no effect on an individual’s survival or reproduction are called ____
a. amino acid substitutions
b. deleterious mutations
c. Hox genes
d. neutral mutations
e. mitochondrial DNA
ANSWER: d
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Which type of speciation can occur when a population encompasses a vast territory that includes a variety of habitats?
a. Sympatric b. Stabilizing selection c. Gene flow d. Parapatric speciation e. Allopatric
Recurring travel between two distinct destinations is
a. migration. b. cyclic emigration. c. emigration. d. immigration. e. cyclic immigration.
The resting potential of a neuron results from a:
a. neutral charge in the cytosolic and extracellular fluids. b. negative cytosolic charge relative to the extracellular fluid. c. positive cytosolic charge relative to the extracellular fluid. d. fluctuating cytosolic charge and constant extracellular charge. e. constant cytosolic charge and fluctuating extracellular charge.
An older friend of yours who has been a dedicated jogger for many years has been having mild knee pain recently when jogging longer distances. He tells you his doctor recommended better-cushioned running shoes. He wonders why better shoes on his feet
will help his knees. Using the material you learned about the skeletal system, what can you say to help your friend understand his doctor's recommendation? What will be an ideal response?