Positive-Sense Single-Stranded RNA Viruses

question 27

Multiple Choice

Positive-sense single-stranded RNA viruses

• A) have only a few genes,including one that allows them to make mRNA from their genome.
• B) include viruses that are responsible for causing plant diseases and are referred to as mosaic viruses.
• C) regenerate themselves by reverse transcription.
• D) are polyphyletic and include some viruses that have more than a million base pairs.
• E) have distinct lipids in their plasma membranes.

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Definitions:

Western Hemisphere

The half of the Earth that lies west of the Prime Meridian and east of the antimeridian, including the Americas and parts of Europe, Africa, and Antarctica.

Columbian Exchange

The widespread transfer of plants, animals, culture, human populations, technology, and ideas between the Americas and the Old World following Columbus's voyages.

Tomatoes

Edible, often red, fruit of the plant Solanum lycopersicum, commonly used in cooking and eaten in a variety of ways worldwide.

Peanuts

A legume crop grown mainly for its edible seeds, known scientifically as Arachis hypogaea.