Assessment Items from the Evolution 1 Small Group

Group Notes

Learning Goal
  1. Address misconceptions of evolution
  2. - individuals do not evolve, populations do
  3. - Evolution is not goal directed
  4. - Evolution is not needs based

Learning Objectives
  1. Identify an incorrect goal directed evolutionary statement
  2. And articulate that statement is false, and that selection acts only on preexisting variation in the population

Summative question (2-teir)
The Hawaiian bobtail squid, Euprymna scolopes, Is a nocturnal invertebrates that live in shallow water. When it feeds at night it is vulnerable too predation due to their dark silhouette against the moon or starlight above. However these squid blend with the background because they have symbiotic bacteria, Vibrio fishceri, in their bodies that produces light.

The squid initiated this symbiotic relationship with the bacteria to protect against predation and to ensure the survival of the species.

This is a false statement. Correct the statement and provide justification to support your answer.

Formative Assessment

Provide the students with a model system commonly used in biology, such as the Pepper Moth.
Then Show the students a clicker question. In small groups, decide which answer is correct.

Model System
The color of pepper moth, Biston betularia, varies in populations from black to light gray due to an inheritable genetic variation. During the day, moths rest on lichen covered trees where they are vulnerable to predation by birds. Before the industrial revolution, the gray coloration predominated. During the Industrial Revolution and the use of coal as an energy source, the population shifted with the black coloration becoming predominant. More recently, with improved air quality, the gray form has returned to be the predominant coloration in the population.

Clicker Question
Which of the following most accurately describes the reasons for the shift in color predominance?
A. Due to the dark background produced by coal dust of the Industrial Revolution, the gray moths mutated to black.
B. During the Industrial Revolution, the gray moths were more vulnerable to predation by birds.
C. The moths coated themselves in coal dust to avoid predation during the Industrial Revolution.
D. Because coal dusted coated the trees, they gray moths did not rest on trees.

Afterwards, the instructor holds a discussion with the students asking "why would someone choose answer x?"