Input: Answer this question:
A research team wanted to produce a smaller variety of German shepherd dogs. They mated the smallest dogs from different litters for several generations. This is an example of which concept?
OPTIONS:
- extinction
- mutation
- selective breeding
- natural selection
Answer: selective breeding

*Question*: Which of the following statements best describes one way that the Moon is different from Earth? OPTIONS:
- The Moon is not solid.
- The Moon has no gravity.
- The Moon has almost no atmosphere.
- The Moon receives almost no solar light.
*Answer*: The Moon has almost no atmosphere.

question:
Asexually produced offspring are genetically
OPTIONS:
- identical to the parent
- different from the parent
- different from each other
- formed by two parents

answer:
identical to the parent

[Q]: Air is made up of many gases. Which gas is found in the greatest amount?
===
OPTIONS:
- Nitrogen
- Oxygen
- Carbon dioxide
- Hydrogen
****
[A]: Nitrogen

question below:
As the population of small fish in a lake decreases, the population of large fish that depend on the small fish for food will
OPTIONS:
- reproduce faster
- begin to produce their own food
- decrease in number
- increase in number
answer below:
decrease in number

question:
Rocks are classified as igneous, metamorphic, or sedimentary according to
OPTIONS:
- their color
- their shape
- how they formed
- the minerals they contain

answer:
how they formed