Which of the Following Is True of the Ionosphere

question 136

Multiple Choice

Which of the following is true of the ionosphere?

• A) It primarily absorbs harmful infrared wavelengths.
• B) All radio signals pass through this region virtually unaffected.
• C) The region principally absorbs gamma rays, X-rays, and interacts with the solar wind.
• D) It is being depleted through interactions with human-produced chlorofluorocarbons.

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Definitions:

Hemizygous

Relates to having only a single copy of a gene instead of the typical two; common in sex-linked traits where the gene is located on a sex chromosome.

X-linked Alleles

Alleles that are located on the X chromosome, which can result in different patterns of inheritance and expression in males and females due to the presence of a single X chromosome in males.

Homozygous

Having two identical alleles of a particular gene or genes, resulting in a specific genotype for that trait.

Heterozygous

Having two different alleles at a specific locus on a pair of homologous chromosomes, resulting in genetic variation.