Which a molecular process found only in retroviruses? OPTIONS:
- reverse translation
- translation
- reverse transcription
- transcription
A: reverse transcription

Scientists dig in a dry area at the bottom of a mountain range. Fossilized shells of freshwater mussels are found in the area. Which is a likely conclusion that scientists will draw based on this evidence? OPTIONS:
- Rivers once flowed through the area.
- Volcanoes were once active in the area.
- The ocean shoreline once reached this area.
- Floods were a common occurrence in this area.
A: Rivers once flowed through the area.

The surface of the Moon is made up of OPTIONS:
- craters, highlands, and flat areas
- swirling gases
- large bodies of water
- a mixture of gases and water
A: craters, highlands, and flat areas

Which scientist is known for his genetics experiments with pea plants? OPTIONS:
- Charles Darwin
- Gregor Mendel
- Carolus Linnaeus
- Robert Hooke
A:
Gregor Mendel