The Communities Established Under Pure Stands of Eastern Hemlock Will

question 30

Multiple Choice

The communities established under pure stands of eastern hemlock will likely become extinct because of ____.

• A) feeding on the trees by the wooly adelgid
• B) the Bd infection of hemlock trees
• C) pathogenic viruses attacking these populations
• D) pathogenic fungi attacking hemlock trees
• E) invasive species exploiting their niche

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Definitions:

Founder Effect

A genetic phenomenon where a new population is established by a small number of individuals from a larger population, potentially leading to a significant genetic drift.

Harmful Allele

A version of a gene that can cause negative effects on the fitness or health of an organism, potentially leading to diseases or disorders.

Rare Allele

An allele that appears infrequently in a population, sometimes associated with specific genetic traits or conditions.

Gene Flow

Gene flow is the transfer of genetic variation from one population to another, which can influence the genetic structure of the receiving population.