The founder effect is an important component of ____
a. natural selection
b. genetic drift
c. gene flow
d. inheritance
e. mutations
ANSWER: b
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A land biome is primarily defined by the dominant ________ that exist in similar climatic conditions around the world.
a. prey species b. predators c. plant species d. temperatures
Overfishing can result in:
1.changes in genetic diversity of a fish population 2.changes in species diversity 3.changes in habitat 4.all of these
In muscle contraction, which of the following
triggers the power stroke?
a. release of Pi from the myosin head b. binding of ATP to the myosin head c. hydrolysis of ATP into ADP and Pi d. cross-bridge formation between actin and myosin e. relaxation of the sarcomere
The path to a myocardial infarction starts with a fat-filled plaque blocking a coronary artery. This condition is called ________
A) atherosclerosis B) angioplasty C) a stent D) coronary bypass