When the Atmosphere Is Not Quite Clear, One May Sometimes

question 35

Multiple Choice

When the atmosphere is not quite clear, one may sometimes see colored circles concentric with the Sun or the Moon. These are generally not more than a few diameters of the Sun or Moon and invariably the innermost ring is blue. The explanation for this phenomena involves:

• A) reflection
• B) refraction
• C) interference
• D) diffraction
• E) Doppler effect

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Definitions:

Phenotypic Variation

The differences in appearance and behavior among individuals of the same species, due to genetic and environmental influences.

Genetic Differences

Variation in the DNA sequence among individuals of the same species or between different species.

Evolutionary Change

A process through which different kinds of living organisms are thought to have developed and diversified from earlier forms during the history of the earth.

Directional Selection

A mode of natural selection where an extreme phenotype is favored over other phenotypes, causing the allele frequency to shift over time.