Question

1. Identify the following elements of hypothesis-based science in this example: (a) question, (b) hypothesis, (c) prediction, (d) control group, and (e) experimental group. (For additional information about hypothesis-based science, see Chapter 1 and the Scientific Skills Review in Appendix F.) 2. Explain how the types of data the researchers chose to collect enabled them to test their prediction. 3. What conclusion do you draw from the data presented above? 4. (a) Predict what would happen if, after 22 months, guppies from the transplanted population were returned to the source pool. (b) Describe an experiment to test your prediction.

Answer 1

Based in the experiment with the guppies, it can be concluded that natural selection is a factor of evolution.

What is a hypothesis?

A hypothesis is an explanation put forward to explain an observation without prior testing.

From the observations in the guppies;

• The question is whether natural selection is favors coloration in guppies
• The hypothesis is that natural selection determines coloration in guppies
• The prediction is that guppies with bright coloration will thrive in a predator free environment
• The control group is the source pool
• the experimental group is the transfer pool
• the conclusion from the data is that guppies with bright coloration are naturally selected
• Returning the guppies from the transfer pool to the source pool will essentially reduce the population of the bright colored guppies due to predation.

Therefore, it can be seen from the guppies that natural selection drives evolution of species.

Learn more about natural selection at: