If the trait has high adaptive value, the frequency will increase.

An adaptive enzyme is an enzyme which is present in a cell only under conditions where it is clear of adaptive value.

1. retain its adaptive value

2. Increase in adaptive value

3. Mutate to a darker color

4. decrease in adaptive value

Grana are defined as the stacks of thylakoids embedded in the stroma of a chloroplast. The adaptive value of the breakdown of chlorophyll is that the important minerals it contains can be re-cycled.

Functionalism