The Dunkers are a religious group that moved from Germany to Pennsylvania in the mid-1700s. They do not marry with members outside their own immediate community. Today, the Dunkers are genetically unique and differ in gene frequencies, at many loci, from
all other populations including those in their original homeland. Which of the following likely explains the genetic uniqueness of this population?
A) population bottleneck and Hardy-Weinberg equilibrium
B) heterozygote advantage and stabilizing selection
C) sexual selection and inbreeding depression
D) mutation and natural selection
E) founder effect and genetic drift
Answer: E
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________ spread more easily in crowded conditions than in places with a sparser population. Thus, these are density-dependent regulating factors
Fill in the blank(s) with correct word
Replacing forests with agricultural or urban areas can significantly affect the water cycle. Why is this?
A. Less moisture is evapotranspired into the atmosphere after deforestation. B. The level of soil nutrients is lower after deforestation. C. Cloud cover will increase after deforestation. D. The rate of evapotranspiration increases after deforestation.
In order to _______, the chest cavity must be expanded in order to decrease the internal air pressure.
a) inhale b) exhale
Reverse transcriptase synthesizes a DNA molecule from an RNA template
Indicate whether the statement is true or false