Question

Read the following descriptions and decide whether they apply to artificial selection, natural selection, or both.
Caused by the environment
caused by humans
does not cause new traits
affects how common traits are in a population

natural selection
artificial selection
both

Answer 1

Here’s how each description applies:

1. **Caused by the environment**: **Natural selection**
- Natural selection occurs due to environmental pressures that favor certain traits over others.

2. **Caused by humans**: **Artificial selection**
- Artificial selection involves human intervention in breeding to promote desired traits.

3. **Does not cause new traits**: **Both**
- Both natural and artificial selection can lead to the prevalence of existing traits without necessarily creating new traits.

4. **Affects how common traits are in a population**: **Both**
- Both natural and artificial selection influence the frequency of traits in a population, either through environmental factors or human choices.

So, the summary would be:
- **Caused by the environment**: Natural selection
- **Caused by humans**: Artificial selection
- **Does not cause new traits**: Both
- **Affects how common traits are in a population**: Both