Answer;
A. flower color is red; AA. flower color is blue
An example of parallel choices in a key is, A. flower color is red; AA. flower color is blue.
Explanation;
-Dichotomous key allow the user to determine the identity of items using a sequence of alternative choices. Dichotomous keys always give two, mutually exclusive choices in parallel statements. The pair of statements is referred to as a couplet and each 1/2 of a couplet is a lead. At each couplet of a dichotomous key the user is presented with two choices about a specific character present in the group of organisms, a specific character state is described for each lead.
-Sometimes the characters are quantitative (i.e., measurements) and sometimes the characters are qualitative (e.g., texture). As the user makes a choice about a particular characteristic of an organism s/he is led to a new branch or couplet of the key. Each couplet provides characteristics that become progressively more specific until the final step is reached and identification is made.
