Question 5 (1 point)

Refer to this portion of a dichotomous key for fish identification to answer the question

1. (a) Has a single dorsal fin +5

(b) Has a double dorsal fin →

5. (a) Has small fin on back near tail →6

(b) Has no fin on back near tail 7

6. (a) Has barbs near the mouth Catfish

(b) Does not have barbs near the mouth

10

What do the numbers after the arrows represent?

o

a

the number of species that have the described characteristic

the number of points that should be added to the organism's identity total

the probability that the organism has tñe described characteristic

the number of the questions that should be considered next.

In the dichotomous key, the characteristics of the fish that will be considered must be carefully observed in order to develop a two-option system. Taking into account the fish features, the dilemmas generated will carry the number 1 (1a or 1b). Each option will present a description of the organism, and at the end of that choice there will be another number (arrow plus number), which belongs to the next feature described or questions asked about the organism to take into account to identify the taxonomic group. Depending on the option chosen, that question will lead to another question to be answered.