Antibody Molecules

question 14

Multiple Choice

Antibody molecules

• A)have a constant region that binds to antigens.
• B)have a variable region that can activate,complement or attach to macrophages.
• C)are large glycolipids.
• D)are called gamma globulins or immunoglobulins.
• E)have all of these characteristics.

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Definitions:

Genetic Flow

The transfer of genetic material between populations of the same species or between different species, leading to changes in genetic makeup.

Genetic Drift

A mechanism of evolution involving random fluctuations in the frequency of alleles within a population, which can cause genetic variation to decrease over time.

Bottleneck

A sudden decrease in a population size caused by adverse environmental factors; may result in genetic drift; also called genetic bottleneck or population bottleneck.

Directional Selection

A type of natural selection that favors one extreme phenotype over another, causing the allele frequency to shift in one direction.