Who is expressing the trait? Who is not? Are there carriers?
How can you tell what type of trait is being tracked

In which of the following ways is the function of the surface of a microsphere similar to the function of an actual cell membrane? a. both make it possible for the conditions in the interior to be different from the conditions outside. b. both provide a barrier that keeps water from flowing across it so the interior remains dry. c. both separate the rna that forms in the interior from any rna that might form in the environment. d. both can actively move molecules into the interior or out into the surrounding environment.

Identify the composition of oceanic and continental crystal rocks. in a model of earth’s interior, where would these rocks appear?

What are the student's observations and inferences before he starts his investigation?