Which Common Problem of U

question 72

Multiple Choice

Which common problem of U.S. cities is now a problem in United States national parks?

• A) homeless people
• B) lack of funding for schools
• C) air pollution
• D) high crime rates
• E) alcoholism

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Definitions:

Genetic Information

The instructions coded in the DNA or RNA that determine the characteristics of an organism.

Hydrogen Bonds

A type of weak chemical bond that occurs when a hydrogen atom bonded to a highly electronegative atom, such as oxygen or nitrogen, experiences an attraction to another electronegative atom.

Cytosine

A pyrimidine base found in DNA and RNA that pairs with guanine.

Guanine

One of the four main nucleobases found in DNA and RNA, it pairs with cytosine during DNA replication.